thumb|right|200px|The Horn family coat of arms features a black drinking horn on yellow background
The Horn family (in Swedish pronounced as /ˈhuːɳ/) is a Swedish noble family from Finland, known since the 14th century.
Its first known member, Olof Mattsson, is documented between 1381 and 1415, having a seat in Halikko parish.[1] His seal featured the figure of a drinking horn. Like other Swedish noble families of medieval origin, the family name was not used as a surname before the 16th century.
Several descendants of Olof Mattsson have been ennobled under extended versions of the family name. Today, only one of these branches still exists, as recognized by the Swedish House of Nobility.
After the Finnish war, the Horn family remained in Sweden, and was not introduced in the new Finnish House of Nobility.
After Klas Horn, raised to baron (sw. friherre) under the name Horn af Åminne in 1561. In 1772 brothers Fredric and Gustaf Adolf Horn af Åminne were raised to counts under the same name. The name derives from the manor Åminne in Halikko, which was in the possession of the family from the 14th century to 1782.
Members of the Horn af Åminne branch include:
Registered as a noble family in 1625. Named after the Kankas manor (fi. Kankainen) in Masku. The spelling reflects an older Swedish orthographical tradition. The male line went extinct in 1728.
The branches Horn af Björneborg, Horn af Marienborg and Horn af Ekebyholm all descend from the Horn af Kanckas branch.
Members of the Horn af Åminne branch include:
After Gustaf Horn, raised to count under the name Horn af Björneborg in 1651. Named after the crown estate of Björneborg, present-day Pori. The male line went extinct in 1657.
Members of the Horn af Björneborg branch include:
After Henrik Horn, raised to count under the name Horn af Marienborg in 1651. Named after Marienburg Castle (Latvian Alūksne) in Livonia. The male line went extinct in 1728.
After Arvid Horn, raised to baron under the name Horn af Ekebyholm in 1700, and later again to count in 1706. Named after Ekebyholm Castle in Uppland. The male line went extinct in 1798.
Members of the Horn af Ekebyholm branch include:
The Swedish noble families Horn af Rantzien and von Horn are not related to the Horn family, but are of Pomeranian and Dutch origin, respectively.[2] [3]