Modern coinage from the Scottish word glen ‘valley’ (Gaelic gleann), in some cases perhaps representing a transferred use of the surname derived from this word. In recent years it has been used far beyond Scotland as a given name. Among well-known bearers of the name is the U.S. country singer Glen Campbell (b. 1936). There has been some confusion with the Welsh name Glyn, which has the same meaning.
German: occupational name or status name from the German word Knapp(e), a variant of Knabe ‘young unmarried man’. In the 15th century this spelling acquired the separate, specialized meanings ‘servant’, ‘apprentice’, or ‘miner’.