As father of the bride in 1938 he was probably in the 1901 census aged anywhere from a young child to approximately 40.

I see two possibilities, both in Braddan, one aged 19 and one aged 34.

Caesar, 19, appears in 1891 as born Lonan (8), the son of Eleanor, widow.

Caesar, 34, appears in 1891 as the son of Ceasar & Eleanor, at Clough Killey, Malew.