Alternative forms 
From Middle English ern, erne, earn, from Old English earn (“eagle”), from Proto-Germanic *arô (“eagle”), from Proto-Indo-European *or- (“large bird, eagle”). Cognate with Dutch and Low German arend (“eagle”), Danish ørn (“eagle”), Swedish örn (“eagle”), German Aar (“eagle”), Ancient Greek ὄρνεον, ὄρνις (órneon, órnis, “bird”).
erne (plural ernes)
- (chiefly poetic, dialectal, sciences) An eagle.
- The bald earn
- An eagle with a distinctive white tail; specifically, the White-tailed Eagle (Haliaeetus albicilla).
Derived terms