He is married to Ada Harriet LEE.
They got married on August 3, 1913 at Holy Trinity, Newington, Southwark, Surrey, he was 38 years old.Sources 1, 2, 3
John James COTTERILL 38 bachelor lift attendant 11 Edinburgh Building, father James COTTERILL deceased. Ada Harriet LEE 40 spinster 11 Edinbrugh Building, father Joseph Henry LEE chocolate dresser. Banns. Witnesses Joseph H LEE & L B LEE/ Ancestry.co.uk