I search the IFHF database at rootsireland.ie. It has 19 million B/M/D records. The database isn't complete yet, but DOES include Co. Galway, and the surname VERDIN.
For the VERDIN surname in Co. Galway B 1827 +/- 20 years, I found 6 records. You can visit the database and by successively entering the letters a-z in the forename field you can deduce the forenames of all six.
Note - records before 1850 are increasingly scarce. By 1800, only about 5% of the B/M records have survived. Of the six Verdins, these may ALL be cousins at some level to your ancestors.