mccarron and mclaughlin families ireland

hi i'm ed mccarren i have ancestors from galway and donegal james mccarron and anna bella boyle married in donegal and left for pennsylvina abt,1860 In galway a patrick mclaughlin married a mary callahan and left for baoton aprpx.1850>looking for their roots in ireland >i have more info such as dates and children.Anyone have ideas on how to track my irish rots?