Johan Anders Jägerhorn

Johan Anders Jägerhorn (1757–1825) was a Finnish nobleman and major in the Swedish army, born near Helsinki when Finland belonged to Sweden. He founded and led the secret Walhalla order at the Suomenlinna fortress. In 1788 he joined the Anjala conspiracy, a group of officers opposing Gustav III's war with Russia; Jägerhorn himself advocated Finnish sovereignty. Condemned to death for treason, he was exiled to Hamburg, where he put Irish rebels in touch with France before the 1798 rising.

After two years in the Tower of London (1799–1801), he returned home and sat as a noble delegate at the 1809 Porvoo Diet that established the autonomous Grand Duchy of Finland.