late 14c., "man-like or heroic woman, woman of extraordinary stature, strength and courage," from Latin virago "female warrior, heroine, amazon," from vir "man" (from PIE root *wi-ro- "man"). Ælfric (c. 1000), following Vulgate, used it in Genesis ii.23 as the name Adam gave to Eve (KJV = woman):
Beo hire nama Uirago, þæt is, fæmne, forðan ðe heo is of hire were genumen.
Related: Viraginous.