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Thank you Rosie99 and Colin for your responses.

Apparently John "Sean" Culkin that I need to find was born to Larry Culkin and ? Mary Miles.
Sorry should clarify that I have John married to Bridget Connolly and had 9 children born with first 2 passing very young.
I believe Bridget's parents maybe Patrick Connolly 1846 and Anne McDonnell 1852.
It is the Larry and his spouse I cannot find nor if there were any siblings for John.
Thanks again

Thanks for all the information above. Super helpful.
Been "studying" hard and so far here is where I am.
My Dad and siblings born Dromore West to Thomas Culkin and Ellen McManus. Dad Sean(John Joseph), his Mum(Ellen) and 4 other siblings went to Birmingham late 40s where last name became Quilkin.
Grandad Thomas one of 9 born to John(Sean)Cuilkin and Bridget Connolly. 
Still gathering info on McManus and O'Malley Great Granny. Also Connolly and Moffatt Great Granny.
Cannot find and info on John's parents . He was born 1869 ish. Some say Larry but cannot a Larry that fits the dates. Lots of Lawrence/Laurence/ but just trying to get my connection correct.
Anyone know or know of someone who may be able to fill it in?

Thanks so much.

Thank you so much. I am so delighted and overwhelmed with all the information you provided .
I just started putting some bits together but you have given so much helpful extra information.

I am so excited.