Hello melink and welcome to R'chat.
You and I are distant cousins. And I'm just trying to figure it out - and hope I've got this right
I have Michael (1802-1884) and Ellen (1804-1905) DWYER who were your father's great-grandparents.
Their son Thomas DWYER (1849-1916) is your father's grandfather. This Thomas was married twice, firstly to Margaret MADDEN then to Mary MAHER.
So is it Ellen LINKLATER who is your father's mother (your grandmother)?
I am descended from the second marriage of Thomas - through his son Richard Charles DWYER who was my father's father - ie my grandfather - my father was Thomas James DWYER which is the same name as his uncle. Too many Thomases!!
Cheers, Judith