Wilhelm Storost, artistic name Vilius Storostas-Vydūnas (22 March 1868 – 20 February 1953), mostly known as Vydūnas, was a Prussian-Lithuanian teacher, poet, humanist, philosopher and Lithuanian writer and philosopher, a leader of the Prussian Lithuanian national movement in Lithuania Minor, and one of leaders of the theosophical movement in East Prussia.
The Storost family was for centuries living in East-Prussia and Wilhelm was born in the village Jonaten (Lithuanian: Jonaičiai), near Heydekrug, in the Kingdom of Prussia. Wilhelm Storost was the name on his German passport, while Vilimas or Vilius Storostas was the literature Lithuanian form used by himself, his family, and other Lithuanians. "Vydūnas" was added to his surname as a pseudonym when he was about 40 years old. Storost was married to Klara Füllhase.
Storost was educated as teacher at the Präparandenanstalt in Pillkallen (1883–85) and at teacher seminar in Ragnit (1885–88). From 1888 to 1892 he was a teacher in Kinten (lit. Kintai), when he went to teach at a boys school in Tilsit until 1912 and taught German, French, English, Lithuanian and sports. In 1912 he left his teaching position in order to take up philosophical studies, which he took at the universities of Greifswald, Halle, Leipzig and Berlin. 1918/19 he taught Lithuanian at the Seminar for Oriental Languages in Berlin under the director Eduard Sachau. Back in Tilsit he dedicated himself to reestablishment of Lithuanian Culture, especially folks songs and rural traditions. He directed a choir and wrote songs as well as theater plays. From 1933 on he worked in Memel at the music school.