Looking for Connollys Related to My Grandfather Guy Connolly Who Lived IN Western NY and Has Family IN PA

My grandfather Guy lived in Wyoming and Genesee Counties in Western Ny. He was Married to a woman Eileen and had 10 children with her than left her and married a woman named barb. Guy has a brother named Harry who also lived in Genesee county. I am looking into who his parents were and so on. I would like to trace the family tree. I have a cousin who said that our great grandfather came from Canada in or around the late 1800's early 1900's. His name I was told is Charles.