luke

From Middle English leuȝke, leuk, leuke, lewk, lewke, louk, luk, luke, lheuc, probably from Old English *hlēoc beside hlēow- (whence lew); compare rēoc and rēow, slēac and unslēaw, etc. Alternatively, perhaps from a verb, Old English *hlēowcian, *hlīewcian (“to make tepid or lukewarm”), whence possibly Middle English leuken (“to make lukewarm”). Compare also Dutch leuk (“lukewarm”), West Frisian lûk (“sly, clever”), Low German luuk (“lively, cheerful", also "lukewarm, dull, indifferent”).