« Reply #9 on: Thursday 09 March 17 09:19 GMT (UK) »
How did you find William's birth place in Ireland?
Guesswork based on the fact that the place of birth given for John Calder/Cather junior and senior in the 1851 census is given as Co Tyrone

Clearly it relies on John and William being actually related - which in itself is pure guesswork, as we don't have a death for William. I know that John junior, Robert and Eleanor were all the children John Cather and Mary Ann Maxwell, and as Robert is with William in 1841, it's a reasonable assumption that they are brothers - but an assumption is all that it is.
I haven't tried pursuing the Co Tyrone angle to see if these families could have come from there. The Irish records for this period are quite tricky to track down - for example, the marriage records on the GRONI website don't start until 1845...
Also, it makes sense that Mary has the second name Ann, but I am curious how you found out.
Hmm - I think I might have made that up - or worse still, taken it from an Ancestry tree - my bad

Do you have the death records for Sarah Calder and William Calder junior? They should confirm their mother's name.
Ruth
McArthur, Milne, Mitchell, Black, Robertson, Morrison, Slessor, Lawrence - Aberdeenshire/Banffshire. Muir, Waddell, Fraser, Orr, Cowden - Lanarkshire/Renfrewshire/Dunbartonshire. Dalziel, Dalzell, Gourley, Cromie, Crombie, Bell - Co Down. Lewis, Corrigan, Morris, Cox, Hay - Monmouthshire/Pembrokeshire. Baker, Ginger, Woodhurst, Swift, Jones - Kent/London.