William Frawley, American actor and vaudevillian (d. 1966)
William Clement Frawley (February 26, 1887 – March 3, 1966) was an American vaudevillian and actor best remembered for playing landlord Fred Mertz in the American television sitcom I Love Lucy and "Bub" O'Casey in the television comedy series My Three Sons.

Frawley began his career in vaudeville in 1914 with his wife, Edna Louise Broedt. Their comedy act, "Frawley and Louise", continued until their divorce in 1927. He performed on Broadway multiple times. In 1916, he signed with Paramount Studios and appeared in more than 100 silent films over the next 35 years.