Looking for family of John FLYNN & Margaret KELLY, married 1855

From RC parish records on www.irishgenealogy.ie, I know that my 2nd-great grandparents had 7 children baptized in the parish of Durrus & Kilcrohane (Muintervara). It seems as though they lived in the town of Donoure. According to an Irish marriages entry (fromwww.familysearch.org),John Flynn, age 40, son of Edward Flynn,married Margaret Kelly, age 26, daughter of Timothy Kelly, on 18 September 1855 in the same parish. I know that 5 of their seven children were alive in 1900, and that at least 4 (James, Julia, Margaret and Agnes) emigrated to the US (Geneva, New York). My question is, what happened to the other three (Patrick, Denis, and Anne)? Any insight on this family would be appreciated! Thank you.