Wikidata:Database reports/identical birth and death dates/1

These are pairs of items with identical dates in date of birth (P569) and date of death (P570). Some should be merged (duplicates), others not: different persons with the same dates (coincidence or virtual twins) or incorrect dates (mixup).

The list is updated regularly (daily?) by bot (items with corrected or removed dates can take a few days to be removed from the list).

• A formatted version is at selection (1)
• Different people with identical dates are listed at false positives. A list of "virtual twins" was developed from that.
• For a status, see Wikidata talk:Database reports/identical birth and death dates

How probable are false positives?

• (A) Items for people with both dates: 2,998,367 ^ref
• (B) Items for people with two people with the same date of birth and date of death (Q20978290): 3,121 ^ref
• Ratio (B/A): 1.04 ‰
• (C) There are 299,025 ^ref redirects to items with both dates, i.e. two items were merged
• Ratio (C/A): 9.97 %
• False positives (B/C): 1.04 % (This underestimates it as it assumes that all items had both dates before being merged).

Items in the list below could be:

Type	Sample	Suggested approach
Items about the same person	John Casimir, Count of Erbach-Breuberg (Q19902526) sitelink to enwiki Johan Casimir van Erbach (Q3917172) sitelink to nlwiki	merge the two items
Items about the same person	Henri Verdun (Q3132140) sitelink to frwiki Maurice Castellain (Q5604715) sitelink to svwiki	merge the two items
Items about the same person	Charles Henry of Nassau-Siegen (Q64055) sitelink to enwiki redirect Charles Henry of Nassau-Siegen (Q16858083) sitelink to enwiki article	delete the redirect-sitelink and merge the two items. Special:MergeItems can sometimes merge them directly.
Items about the same person	Karl Gottlieb von Windisch (Q927307) items with sitelinks Karl Gottlieb von Windisch (Q1465093) sitelink manually moved, but item not redirect	merge the two items
Items about the same person	Peter Lamberg (Q5932605) sitelink to svwiki (disambiguation page) Peter Lamberg (Q19976026) sitelink to svwiki article	delete the sitelink to the disambiguation page and merge the two items (sitelink didn't get updated on pagemove) find a new item for the disambiguation page or create it
Items about likely about the same person, but this isn't conclusive	Paul Hofmann (Q90030) and Paul Gutike (Q55681910) Eyre Turquand (Q65807514) and Ellen Eyre Turquand (Q72890320)	add said to be the same as (P460) to each, do not merge them
Items about different people, with incorrect dates and possibly mixed-up sitelinks	Yrjö Saarinen (Q11903052) and Yrjö R. Saarinen (Q11903045) Aleksander Thomson (Q3742060) and Aleksander Thomson (Q16406815)	correct dates and/or fix sitelinks. Don't merge. If in doubt, use the articles' talk pages or WD:IWC
Items about a person and items with dates they shouldn't have	Sigmund Freud (Q9215) Biography of Sigmund Freud (Q2904119)	remove dates from the item that shouldn't have them
Items for identical persons, but with two articles at the same Wikipedia	Olavi Merinen (Q11885292) with article at fiwiki Olavi Merinen (Q17382548) with another article at fiwiki	possibly suggest to Wikipedia to merge both adding Template:Merge (Q6919004) to each article mark one with instance of (P31): Wikimedia duplicated page (Q17362920) and qualifier of (P642) linking to the other item Alternatively, interlink both with said to be the same as (P460) possibly move statements to the one item that isn't marked with Wikimedia duplicated page (Q17362920) Once the merge of the articles completed, the items can be merged
False positives: two different persons, with same dates of birth and death	Étienne Bernand (Q7121177) and André Bernand (Q19953021) Harry Elkins Widener (Q511212) and Juozas Montvila (Q4301999) Robun Kanagaki (Q1723541) and James MacGregor (Q6138639)	double-check dates, ideally with references interlink both items with different from (P1889) and qualify with criterion used (P1013) = two people with the same date of birth and date of death (Q20978290) add items to False_positives
Already merged/fixed	some of the below (items redirected, labels and statements appear then as identical)	do nothing ;)

Steps:

• Are both items about the same person?
  • If yes:
    • Can the items be merged?
      • If yes: merge them. In the next update, the pair will disappear from the list
      • If no: tag the two articles at Wikipedia for merging. In the next update, the pair will be moved to the "marked for merging" section of the main list.
  • If no:
    • Are the instance of (P31) values correct?
      • If no: correct them
    • Should the item have date of birth (P569)/date of death (P570)?
      • If no: remove them. In one of the next updates, the pair will disappear from the list.
    • Are the dates correct?
      • If no: correct them. In one of the next updates, the pair will disappear from the list.
      • If yes: add the pair to "false positives". In the next update, the pair will disappear from the list.

Update frequency:

• Removal of merged items: generally daily
• Removal of items marked as different: generally daily
• Removal of items with corrected dates: generally weekly (based on Wikidata dumps)
• Merge of items identified as duplicates and marked for merging at a Wikipedia (if they still include identical dates): occasionally by bot once the merger at Wikipedia is completed.
• Addition of newly identified items: generally weekly (based on Wikidata dumps)

Tools:

• Note Markasduplicate

DOB	DOD	Merged	Person 1	Person 2	P31 (#1)	P31 (#2)	P21 (#1)	P21 (#2)	P27 (#1)	P27 (#2)	P106 (#1)	P106 (#2)	Diff from	TO DO
7 October 1853, 4 November 1868 4 November 1868	30 May 1917, 20 March 1939 20 March 1939		František Jaroslav Rypáček	Karel Ryska	human	human	male	male	Austria-Hungary		pedagogue, writer, poet, teacher, historian, literary historian, local historian, high school teacher, editing staff	technician	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
28 March 1887	17 November 1940 17 November 1940		Jamaluddin	Muhammad Kasyful Anwar	human	human	male	male	Indonesia	Indonesia	'ālim	'ālim	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
20 July 1893 20 July 1893	13 October 1955 13 October 1955		Eusebio Fernández Muñiz	Facundo Pascual Quilis	human	human	male	male	Spain		businessperson, sports executive		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
29 April 1769 29 April 1769	1 May 1852 1 May 1852		Jan Škoda	Jan Škoda	human	human	male	male			artisan, locksmith, gardener	artisan, locksmith, gardener	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
25 July 1807 25 July 1807	16 May 1894 16 May 1894		Johann Karlík	Johann Karlík	human	human	male	male			Catholic priest, Christian minister, Premonstratensians, teacher	Catholic priest, Christian minister, Premonstratensians, teacher	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
27 October 1807 27 October 1807	1 May 1886 1 May 1886		Charles Lemettre	Amelie Lambelin	human	human	male	female			cooper		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
26 March 1849 26 March 1849	9 March 1926 9 March 1926		Václav A. Hutter	Václav A. Hutter	human	human	male	male			teacher, opinion journalist	teacher, opinion journalist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
26 December 1859 26 December 1859	13 October 1938 13 October 1938		František Šollar	František Šollar	human	human	male	male			horn player, musician, harpist, teacher	horn player, musician, harpist, teacher	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
20 July 1875 20 July 1875	1932, 13 March 1932 13 March 1932		Antonin Schlesinger	Hans Schlesinger	human	human	male	male			Catholic priest	painter	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
20 January 1881 20 January 1881, 10 April 1939	14 January 1982 14 January 1982		Ernst Dubach	Albert Dubach	human	human	male	male	Switzerland	Switzerland	sport cyclist	sport cyclist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
5 August 1882 5 August 1882	29 June 1955 29 June 1955		Gerhard Kropatschek	Walter Kropatscheck	human	human	male	male		Germany	pedagogue	classical archaeologist, editor, vicar, collector	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
24 February 1889 24 February 1889	27 September 1942 27 September 1942		no label	no label	human	human	male	male			laborer, journalist, anti-fascist	laborer, journalist, anti-fascist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
7 July 1889 7 July 1889	15 March 1962 15 March 1962		Anna Steimarová	Anna Steimarová	human	human	female	female	Austria-Hungary, Czechoslovakia	Austria-Hungary, Czechoslovakia	actor, operetta singer, singer	actor, operetta singer, singer	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
28 December 1894 28 December 1894	6 February 1920 6 February 1920		Slavojar Částek	Slavojar Částek	human	human	male	male			soldier	soldier	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
10 October 1896 10 October 1896	20 December 1944 20 December 1944		Volfgang Jankovec	Volfgang Jankovec	human	human	male	male	Cisleithania, Czechoslovakia	Cisleithania, Czechoslovakia	teacher, journalist, anti-fascist	teacher, journalist, anti-fascist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
21 February 1903 21 February 1903	10 December 1995 10 December 1995		Jožka Králíková	Josefa Mattesová	human	human	female	female			opera singer	librarian	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
1913, 18 February 1911 18 February 1911	21 October 1983, 20 August 1983 20 August 1983		Franz Novak	František Novák	human	human	male		Germany, Austria		Hauptsturmführer	preservationist, architect, opinion journalist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
17 September 1914, 7 September 1914 17 September 1914, 7 September 1914	5 January 1983 5 January 1983		Jan Roubík	Jan Roubík	human	human	male	male			jurist, airman, political prisoner, aircraft pilot	jurist, airman, political prisoner, aircraft pilot	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
1 April 1916 1 April 1916	1987, 6 February 1987 6 February 1987		Miroslav Hanák	Jan Říha	human	human	male				military officer	opinion journalist, numismatist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
6 August 1917 6 August 1917	2 September 1994 2 September 1994		Miloslav Šnejdar	Miloslav Šnejdar	human	human	male	male	Czech Republic	Czech Republic	composer, violinist, music teacher, musician, teacher	composer, violinist, music teacher, musician, teacher	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
18 September 1929 1929	5 August 1986 1986		Francis Zagorskis	Willie Patterson	human	human	male	male	Latvia	United Kingdom	scientist, farmer	comics artist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
29 September 1950 29 September 1950	21 March 2021 21 March 2021		Didi Gat	no label	human	human	male	male	Israel		dub actor, film actor		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
22 October 1954 22 October 1954	14 May 2021 14 May 2021		no label	no label	human	human	male	male	Soviet Union, Ukraine	Soviet Union, Ukraine	historian	historian, local historian, university teacher	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2