Middle English, going back to Old English cælf, plural calfur (Anglian), cealf (West Saxon), going back to Germanic *kalƀaz, *kalƀiz-, neuter s-stem (whence also Old Saxon kalf "young of a cow," Old High German kalb, Old Norse kalfr, and, from a derivative *kalƀōn-, Old High German kalba "female calf," Gothic kalbo), of uncertain origin
Note: Associated with Greek delphýs "womb," Sanskrit garbha- "womb, fetus," going back to Indo-European *gwelbhu- (see -adelphous), but the expected outcome of an ablaut form *gwolbh-es- would be Germanic *kwalb-iz-, which does not match the attested forms.
Noun (2)
Middle English, borrowed from Old Norse kalfi "calf of the leg," going back to a Germanic source probably akin to early Modern Dutch kalf "swelling of the hand or foot," Old High German wazzerchalp "edema," German dialect Kalb "muscle"
First Known Use
Noun (1)
before the 12th century, in the meaning defined at sense 1a