Joseff could be both a masculine given name and a surname. Notable people with the name include:
Joseff Gnagbo (born c. 1974), Ivorian-born Welsh activist Joseff John Morrell (born 1997), English-born footballer Eugene Joseff, founder of Joseff of Hollywood Joan Castle Joseff (1912–2010), American jeweler and businesswoman
See also Joseph, masculine given name