My Patrick Guinane, son of Thomas Guinane & Bridget Casey, of Annagh Townland, Murroe Parish, Co Limerick , who was baptised Mar 5, 1864, married Margaret Morgan in Chicago. He became an attorney.
Above Thomas Guinane, baptised Jan 4, 1818 in Murroe, was the first child of Timothy Guinane & Mary Rainsford of Murroe.
It is quite likely that your Patrick was from a related Guinane line, as the name was not very common, and Nenagh isn't far. Descendants of "my" Guinane's live in Nenagh today.
I'm currently trying to find the siblings of Timothy Guinane & will post anything I find.