Updated June 9, 2019 Share: Family name origins & meanings German : from Kunz, a pet form of Konrad.Eastern German (of Slavic origin) : nickname from Polish kusy ‘short’.German : habitational name from Bernkastel-Kues on the Mosel river.German : from the personal name Kus, a pet form of Markus (see Mark) or Dominikus (see Dominique).