Hi Jc, Sorry that ive posted so much over time and confused anyone,
Hi. I understand what you mean and I will try and do what you suggest.

I know the following:

My grandfather was Robert Henry Cain - born Douglas 1894.
His parents were John Henry Cain and Edith Ann Cowle/Cowell
And I know Edith Cowell had a daughter Lydia Cowell about 1889

John Henry Cain was buried in Braddan age 59 (B: 26th January 1924)
Robert Henry Cain (my grandfather; died 1979)

Looking at all census on ancestry, John Cain has different ages for himself and different place of birth, except for 1911 where he states he is 49 years of age and born in Union Mills.