The state of Ohio is west of the state of Pennsylvania (and Philadelphia is in eastern Penna.). Patrick Gallagher could have been related to either Michael or his wife, Patrick's wife could have been related to them or perhaps they were just distant relatives, friends, etc.
Philadelphia marriages: Jennie A. Loftus m.1913 Henry.
1920 Census- 1267 South 29th St.
John Henry 37, Ireland, to U.S. 1911, stoker Rep_- electric co.
wife Jennie Henry 28, Ireland, to U.S.1910
Children: John 4 5/12, Mary 3 1/12, Anna 11/12
1930 Census- 1267 South 29th St.
John Henry 48, Ireland, m.age 31, to U.S.1910, watertender _- Phila _?
wife Regina 49, Ireland, m.age 32, to U.S. 1900
Children: John 14, Mary 13, Ann Marie 11, Elizabeth 8, William 7, Arthur 5, Jane 2.