Pet form of Judith, recorded from the 17th century. It was the name adopted by the singer and film star Judy Garland (1922–69, original name Frances Gumm), and has since increasingly been used as an independent name.
German: from the old personal name Chunizo, formed with Old High German kuoni ‘bold’, ‘brave’, ‘experienced’, or possibly chunni ‘race’, ‘people’. It is sometimes taken as a pet form of Konrad. The expression Hinz und Kunz was a German equivalent of ‘every Tom, Dick, and Harry’.