
English and German: metonymic occupational name for a glazier or glass blower from Old English glæs ‘glass’ Middle High German glas. In English the name may also derive from a nickname from Old French glas clas ‘clash of arms noise tumult (of battle)’. Irish (Ulster) Welsh Cornish and Scottish: from an Anglicized form of the epithet glas ‘slate colored gray’ or any of various Gaelic surnames de...