John Joseph Maus, known professionally as John Walker, was an American singer, songwriter and guitarist, best known as the founder of the Walker Brothers, who had their greatest success in the 1960s, particularly in the United Kingdom.

David Lee Marks is an American guitarist who was an early member of the Beach Boys. While growing up in Hawthorne, California, Marks was a neighborhood friend of the original band members and was a frequent participant at their family get-togethers. Following his departure from the group, Marks fronted the Marksmen and performed and recorded as a session musician.