Lieutenant General Herman Georg Waldemar Wrangel (30 March 1859 – 13 January 1938) was a senior officer in the Swedish Coastal Artillery.

Wrangel was born on 30 March 1859 in Klara Parish, Stockholm, Sweden,[1] the third son of the then lieutenant, later colonel Erik Fredrik Wrangel (1816–1896) and his wife Katarina Maria Gustafva Ehrenstam, a daughter of minister Johan Fredrik Ehrenstam and his wife (née af Trolle).

His grandmother was the granddaughter of admiral Henrik af Trolle, together with Chapman in his time the innovator of the Swedish Navy.

[4] Wrangel was promoted to sub-lieutenant (löjtnant) in 1883 and two years later he was called up for service in the General Staff and continued partly there, partly in the Fleet Staff until 1889, when at the same time as his appointment as captain he was commanded to serve as an adjutant in the Military Office of the Ministry for Naval Affairs, which position he held until 1891.

[3] Wrangel was promoted to lieutenant commander and was posted as head of the Communications Department in the Fleet Staff from 1900 to 1901.

Wrangel was also a diligent writer, especially in the naval field, in addition to a number of magazine and newspaper essays as well as articles in Nordisk familjebok as well as several brochures published, among others Sjövind, tankar i försvarsfrågan (1886), Lärobok i teoretisk och praktisk navigation (1897; 2nd edition in 1910; translated to Spanish), Svenska flottans bok (1898) as well as the work based on extensive research Kriget i Östersjön 1719–1721 (2 volumes, 1906–1907), and for two years he conducted research for the part of the General Staff's work Sveriges krig åren 1808–09 ("Sweden's war in the years 1808–09"), which includes the war at sea.

Wrangel married on 7 March 1922 in Stockholm (Västerhaninge Parish, Stockholm County) with Gertrud Erika Matilda Sterky (11 May 1884 – 4 March 1923 in Solna Parish), the daughter of Carl Gustaf Sterky and Hedvig Augusta Norström.