Attached a copy of the church marriage of John Steward and Johanna Hourigan in Knocklong on January 21st 1846. I have not found a birth record for John, but there is a baptism for a John Stuart with parents William Stuart and Elizabeth O'Brien 1821 in St. Mary's, Limerick city.
There ia a baptismal record for a Johanna Hourigan on September 25th 1826 in Knockainy-Patrickswell. Parents: James Hourigan and Joanna Carroll.
There is a Military record in 1851 for a John Steward. Appears to be for a short period!