Steve ............ do you have any more info? Really need to know their ages/parents or something substantial ............. names just aren't enought to locate people in the census as you could well end up following the wrong line without realising it.
When/where did they died? How old were they? Did they have any brothers/sisters?
You say that Thomas was married in Leeds in 1911. The certificate should show how old he was, address, occupation, name of his father, father's occupation. You really need to get this if you haven't already or, if you already have it, just post ALL the information that is on it.
Best wishes
Casalguidi