I just spoke to my mum and she thinks your dad might be Frank Doolan's brother.Have you got an aunt Lorna? I met Frank quite a few times.He and Terese McGrath put together a Doolan family history book, have you got a copy of these, I think there are 2.My brother is bringing them down to me over the weekend. They have a lot of info. Your grandfather and my greatgrandfather (James) were brothers we think.
Anyway I would be interested in exploring some of the details as a lot of the geneology work was done before the internet and there is probably a lot more info available now.I'm also going to do the Natgeo genome project this year and give a DNA sample to get some more info on the family heritage.I'm trying to get one of my brothers to do it also so we can track our paternal line.