Udolphus is a masculine given name, a variant of Adolphus, and may refer to:
Basil Udolphus Aylmer, 11th Baron Aylmer (1886–1977) Udolphus Aylmer, 7th Baron Aylmer (1814–1901) Udolphus Aylmer Coates (1908–2000), British town planner Udolphus Haron (360–392), fictional duke of Frisia Udolphus Wright, actor in Mixed Marriage