Prince. 1619–82, German-born nephew of Charles I: Royalist general during the Civil War (until 1646) and commander of the Royalist fleet (1648–50). After the Restoration he was an admiral of the English fleet in wars against the Dutch
Rupert in British English2
(ˈruːpət)
noun
military derogatory, slang
a junior officer in the British army
Word origin
from association of this forename with high social class in Britain