- a member of the royal family that ruled in Romania from 1866 to 1947, in Prussia from 1701 to 1918, and in the German Empire from 1871 to 1918.
- a German noble family, the younger (Franconian) branch of which provided rulers of Brandenburg (1417–1701) and Prussia (1701–1918). The last kings of Prussia (1871–1918) were also emperors of Germany
