Tadanaga

Tadanaga (written: 忠長 or 忠良) is a masculine Japanese given name. Notable people with the name include:


 * Aoyama Tadanaga (青山 忠良) (1806–1864), Japanese daimyō
 * Tokugawa Tadanaga (徳川 忠長) (1606–1633), Japanese daimyō