 Walter von Hülsen (1863–1947), later general of infantry, was his older brother.Hülsen married Magdalene von Schaper on 31 July 1896 in Berlin.On 26 December 1918 after World War I, Hülsen formed the Freikorps (von) Hülsen, a paramilitary unit which participated in the suppression of the Spartacist League in Berlin.