Joseph Rooney was born on March 5, 1887 in Iona, Prince Edward Island, Canada. His parents were Philip Rooney and Ellen McKenna. He was the second oldest son. He had 13 siblings. His father Phililp was a shoemaker and later became a farmer. His mother Ellen was a housewife. Many of Joseph's siblings were in the clergy as priests or nuns.
Joseph would join the clergy and was ordained as a priest on June 11, 1916. He was a professor at St Dunstan's University from 1918-1919 until he enlisted in the C.E.F as an Honorary Captain in the Canadian Chaplain Services from June 17, 1918 to September 7, 1919. During this time he served overseas in England and France. His C.E.F. file is digitized by the Library and Archives of Canada if you would like to read it.
After the war ended, he returned to St. Dunstan's to resume his duties there. His tenure at the university was short lived as he left to become a parish priest at Lawrence Church in Morell, PEI from 1920-1940 and at All Saints Church in Cardigan, PEI from 1940 until his death in 1942. Joseph was buried in the parish church's cemetery. You will see that his headstone provides a life history on Joseph, which I've summarized here. His memorial page is here if you would like to pay your respects.
Rest in peace cousin Joseph.