Slevin Dillon of Ireland 19th Century

My Grandfather was Peter Slevin born in 1863 in Portarlington. He married Sarah Ryan, born in Co Carlow in 1871, in 1996 in Donnybrook church Dublin. My Great Grandfather was James Slevin who was dead by 1896. Peter had a brother called Thomas who married Bridget Keogh and lived in Carragh, Kildare. Mr mother's father was Michael Dillon born 1867 in Westmeath. He married Margaret McArdle. My Great Grandfather was John Dillon who married Ellen Fagan.