It was his wife, Margaret Athy, who founded the Augustinian monastery of Forthill while he was on a trading voyage.
He may have had a second wife, a daughter of Mayor John Bodkin.
Following the sudden death by drowning of Mayor Arthur Lynch, Stephen Lynch was elected to fill out his term.
He continued the work of his father and mother, Anastacia Martin, by extending what would become known as Lynch's Aisle in St. Nicholas' Collegiate Church.
The arms of both Lynch and his wife, along with that of his parents, adorn the upper portion of two windows in the aisle.