recently started on family connections to Mary Anne Gallacher b 1863, daughter of John Gallacher & Rose (M.S. unreadable), who married John McCoriskin (b 1859) in Glasgow in 1882. John was son of John McCoriskin & Sarah Morrow.
Also John Gallacher b 1861, son of John Gallacher & Mary Kelly, who married Catherine Colquhoun (b 1862) in Glasgow in 1881. Catherine's parents were Matthew Colquhoun and Margaret Holms (or Steel, by previous marriage)
ALl of the parents noted here were born in Ireland with the exception of Margaret Kelly who was born Pollockshaws, Renfrewshire in 1831 and the Colquhouns.
Both of the marriages noted above brought two sides of Gallachers together when John & Sarah's son, John McCoriskin, married John and Catherine's daughter, Margaret Gallacher, in 1912 in Glasgow. A child of that marriage, Catherine Gallagher McCorrisken, married Patrick Joseph McCulloch. They were the parents of my brother in law, John, who has left me to do the hard yards of researching his family.
Would be interested if you have any of these names in your sights.