Which of Peter Lincoln's brothers had an acting career?
Peter Sarstedt Peter Eardley Sarstedt (10 December 1941 – 8 January 2017), briefly billed early in his career as Peter Lincoln, was a British singer, instrumentalist and award-winning songwriter. He was the brother of musicians Eden Kane and Clive "Robin" Sarstedt.
Mel Stewart Milton "Mel" Stewart (September 19, 1929 – February 24, 2002) was an American character actor, television director, and musician who appeared in numerous films and television shows from the 1960s to the 1990s. He is best known for playing Henry Jefferson on the popular television series "All in the Family" and for playing section chief Billy Melrose on the television series "Scarecrow and Mrs. King". Stewart is sometimes credited as Melvin Stewart or Mel Stuart.