raven (n.) Look up raven at Dictionary.com
Old English hræfn (Mercian), hrefn; hræfn (Northumbrian, West Saxon), from Proto-Germanic *khrabanas (cf. Old Norse hrafn, Danish ravn, Dutch raaf, Old High German hraban, German Rabe "raven," Old English hroc "rook"), from PIE root *ker-, imitative of harsh sounds (cf. Latin crepare "to creak, clatter," cornix "crow," corvus "raven;" Greek korax "raven," korone "crow;" Old Church Slavonic kruku "raven;" Lithuanian krauklys "crow").
The common raven is easily tamed, but is mischievous and thievish, and has been popularly regarded as a bird of evil omen and mysterious character. [OED]
Old English also used hræmn, hremm. The raven standard was the flag of the Danish Vikings.