Sir William Samuel McMahon, 3rd Bt.

Parents

• Sir Beresford Burston McMahon, 2nd Bt.
• Maria Catherine Bateson

Children

Siblings

• Maria Constance Georgiana McMahon
• Frances Thomasine McMahon
• Catherine Charlotte McMahon
• Robert Bateson McMahon
• Nina Gertrude McMahon
• Beresford Burston McMahon
• Gerald Charles McMahon
• Sir Lionel McMahon, 4th Bt.