Ruler · 1866 – 1942

J. B. M. Hertzog

Lived 1866 – 1942; politician, military personnel. Prime Minister of South Africa of Union of South Africa, 1924 – 1939.

Wikidata's English label: James Barry Munnik Hertzog.

For the full story, the article on Wikipedia (CC BY-SA 4.0); this page holds what the record says of the reign.

Lived: 1866 – 1942; 76 years
In office: 15 years; one reign
Lines: 1; Union of South Africa
Left it: resigned; the ruler's own article

Prime Minister of South Africa

Union of South Africa · the 2nd of 11 dated reigns · 1919 – 1978

Jan Smuts1919 – 1924

J. B. M. Hertzog1924 – 1939

George V1931 – 1936

Edward VIII1936

George VI1936 – 1952

6 after

killed, executed or dead in battledied in officeleft alive by a regular roada second row: a reign that began before the last had ended — rival claimants, or a shared thronethis entry

Reigned 1924 – 1939 · 15 years · came to it aged 58

Left it: resignedread from the ruler's own article

Hertzog resigned and his coalition partner Smuts became prime minister.

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J. B. M. Hertzog in the atlas: the article, every line they sat in, and the map in their years.
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Wikidata Q356395 (CC0) · the reigns from Wikidata's P39 terms, the rulers' own articles read by grammar (sentences quoted above, CC BY-SA 4.0) and Kokkonen & Sundell where they code the line · data built 2026-10-06 · Pastlas v2.9.1, by Oleh Voronko. The published atlas and its data are for non-commercial use.