Wikipedia
Adlercreutz is a Swedish and Finnish noble family. Its oldest known ancestor is Erik Markusson, dead 1654, who was a farmer in Biskops, Stortötar, Lohja, Uusimaa. His son Thomas Teuterström (1643–1710) was an accountant and was ennobled on 26 September 1700 in Karlshamn by King Charles XII of Sweden with the name Adlercreutz, and was introduced at Riddarhuset in 1703 with the number 1382, which has later been changed to 1386 B.
Two members of the family were immatriculated in Finland's house of nobility on 17 September 1818 as noble family number 97.
Among the members of the Swedish noble family was major general, later general of the cavalry and one of the lords of the realm, count Carl Johan Adlercreutz (1757–1815). On 30 June 1808 he was, as commander of the Sword Order, elevated into the then second class, the class of knights, and his family became a commander family with the number 1386 A. The commander family includes the baronial family Adlercreutz and the comital family Adlercreutz.
Other members of the family include Swedish prime minister Axel Gustav Adlercreutz and the modernist architect Eric Adlercreutz.
The baronial family Adlercreutz is a branch of the commander family Adlercreutz. The major general, later the general of the cavalry and one of the lords of the realm, count Carl Johan Adlercreutz (1757-1815), was created a Swedish baron together with his three sons Fredrik Thomas Adlercreutz (1793-1852), Carl Gustaf Adlercreutz (1799-1883 and Johan Henrik Adlercreutz (1800-1841), and the title should follow the oldest son, son after son in accordance with primogeniture, 30 August 1808 in high quarter Grelsby on Åland by King Gustav IV Adolf of Sweden, although the patent of nobility was issued first 27 February 1810 at Stockholm Palace by King Charles XIII. They were introduced at the Swedish house of lords 15 March 1810 as baronial family number 331. The two younger sons ended their lines themselves 9 April 1883 and 18 October 1841.
Together with this family belongs the comital family Adlercreutz.
The present baron Adlercreutz is Magnus Adlercreutz, born 11 March 1977, who became a baron at his birth, since his father had already inherited the comital title.
The Swedish comital family Adlercreutz is a part of the baronial family Adlercreutz. The general of the Swedish cavalry, cabinet minister and adjutant general Carl Johan Adlercreutz (1757-1815), who had been created a Swedish baron 30 August 1808, was created Swedish count in accordance with the 37th paragraph of the Swedish instrument of government of 1809, meaning only the head of the family possesses the title, 31 August 1814 in Uddevalla by King Charles XIII of Sweden, and was introduced at the Swedish house of the nobility 10 March 1814 as comital family number 125.
The present count is Carl Fredrik Magnus Adlercreutz, born 25 October 1944, who inherited the title from his father, count Gustaf Fredrik Adlercreutz, at his death in 1973. His son Magnus Gustaf Victor Adlercreutz is the present baron Adlercreutz.