Updated June 9, 2019 Share: Boy name origins & meanings German : Small Boy name variations Klein Klein - 7% this year Masculine Rare Find out more Kleiner Kleiner 0 % this year Masculine Rare Find out more Kline Kline - 17% this year Masculine Rare Find out more Family name origins & meanings German : variant of Klein.German : from a reduced form of the medieval personal name Kleinhart, from Middle High German klein ‘small’ + hart ‘strong’.