I have found this record on familysearch.org for a marriage in Kildare. Is this your man and his wife?
You could try searching for his birth on here if you have his dob. Try advanced search option if nothing comes up 1st time.
Note the spelling is Ayrs on this record.
marriage: 20 Sep 1868 —Carbury, Kildare, Ireland
parents: William Ayrs
spouse: Bridget Gill
record title: Ireland Marriages, 1619-1898
groom's name: Luke Ayrs
bride's name: Bridget Gill
marriage date: 20 Sep 1868
marriage place: Carbury, Kildare, Ireland
groom's father's name: William Ayrs
bride's father's name: Thomas Gill
Do you have his dob at all?
Calmar
