From Old Norse 'leggr' — one of the most striking Viking replacements, taking over the name for one's own body part.
Each of the limbs on which a person or animal walks and stands.
From Old Norse 'leggr' (leg, bone, hollow stalk, limb), from Proto-Germanic *lagjaz, of uncertain further etymology — possibly connected to PIE *lek- (limb, joint) or to a root meaning 'hollow bone.' This is one of the most dramatic Norse replacements in English: the native Old English word for leg was 'sceanca' (shank), but the Viking settlers' word displaced it entirely during the Danelaw period (9th–11th centuries). The original sense of Old Norse 'leggr' may have
'Leg' is a Viking import — Old English used 'sceanca' (shank) for the same body part. The Norse word so thoroughly displaced the native term that most English speakers have no idea 'leg' is a foreign borrowing. It is one of the most intimate Norse contributions to English, replacing a word for a part of one's own