Originally a pet form of Theodore, but now generally used for Edward, and also as an independent given name. Teddy bears were so named after the American president Theodore Roosevelt (1858–1919). Occasionally it is also used as a girl's name, in part as a pet form of Edwina.
English: nickname for a fair-minded man, from Middle English, Old French justice ‘justice’, ‘equity’, Latin iustitia, a derivative of iustus (see Just). It may also have been an occupational name for a judge, since this metonymic use of the word is attested from as early as the 12th century.