A diminutive of the male given names Thaddeus or Thaddaeus, sometimes also used as a formal given name.

A male given name from Ancient Greek, of common usage, variant of Thaddaeus.

An Apostle, identified with Jude. / (rare) A male given name from Ancient Greek; usually spelled Thaddeus.

(mineralogy) An orthorhombic-disphenoidal yellow orange mineral containing calcium, fluorine, hydrogen, iron, magnesium, manganese, oxygen, and phosphorus.