common European songbird, 1540s, shortening of Robin Redbreast (mid-15c.), from masc. personal name Robin. It ousted the native ruddock. In North America, the name was applied to the red-breasted thrush by 1703. Robin's egg as a shade of blue is attested from 1881.
masc. proper name, from Old French Robin, diminutive of Robert (q.v.). Robin Goodfellow "sportive elf of the English countryside," is first attested 1530s, popular 16-17c.; Robin Hood is at least from late 14c.