Portnoff

Portnoff is a surname, a spelling variant of Portnov. Notable people with the surname include:


 * Leo Portnoff (1875–1940), Ukrainian musician, teacher, and composer
 * Mischa Portnoff (1901–1979), German-born American composer and teacher
 * Morrie Portnoff, Canadian astronomer, the namesake of 10333 Portnoff, main-belt asteroid