My Family Research

Hello, I've been researching my Irish family tree for some years now. The names I am interested in include:-
Hallahan Jeremiah + O'Neill Bridget
Hallahan Henry + Lyons Mary (Mamie)
Lyons Edward + Macken Ellen
Lyons Peter + Ennis Julia
Macken Michael + Hynes Mary Anne
Ennis James + Macken Mary
Ennis James (Jimmy) + McCabe Mary Josephine
- Those are the combinations on my father's side. On my mother's side I am interested in:-
O'Neill Patrick + Keating Mary
O'Neill Daniel + Minogue Mary
Keating Patrick + Kelly Anne
Keating Thomas + Wilson Fanny
Keating John + Moran Mary
Moran William + Browne Mary
Moran William + Nowlan Margaret

I am also trying to find the descendants of Mary and William J. Jefferson of Chicago for some time now. I've only just discovered this site. My Mary was born in Ireland circa 1843 and her husband William Jefferson was born in Canada circa 1840. They had, to my knowledge, four children:- Benjamin H. dob c 1865, William T. dob c 1866, May E. dob c 1868 and Ralph J. D. dob c 1870. I have many old photographs of this family and would like to make connection to living relatives. Can you help me?