In the baptism register of St. Nicholas Church of Ireland, Dundalk, there is a Thomas Gordon baptised 11/05/1873, Birth date 10/02/1873. Parents are Hugh and Maria Gordon. Father's Occupation is Iron-moulder. There are siblings William (BD 1855), Mary Anne (Birth date 1860), Margaret (1861), Elizabeth (1868), Samuel (1870), Margaret (1875).
I won't go into too much detail in case it is the wrong family, but it appears that Mary Ann married John McAlister, Clerk Great Northern Railway, on 11/06/1891; Elizabeth married Thomas Ramsey, Fitter, on 01/10/1891; Margaret married Robert Ramsey, Engineer, on 20/12/1900
Don't know if that helps.
Brendan