Tadateru (written: 忠輝, 忠英 or 忠照) is a masculine Japanese given name. Notable people with the name include:
(1611–1652), Japanese daimyō , Japanese humanitarian, president of the International Federation of Red Cross and Red Crescent Societies (1592–1683), Japanese daimyō (1613–1654), Japanese daimyō (1665–1716), Japanese daimyō