Radu is a masculine Romanian given name of Slavic etymological origin, derived from the Old Church Slavonic root rad- (cf.
радъ "glad").
Radu became widespread among the (non-Slavic) Romanians because of Radu Negru's status as legendary founder of Wallachia, a historical Romanian state.
Many Wallachian and some Moldavian voivodes or princes have been named Radu.
Notable people named Radu include: This section is organized chronologically.