erndeb:  There was a William Thomas Davies born flint approx 1866 (not in my family so far as I know) you can find him on 1861 census RG10/5644/57/9 at   58 Sidney St , Flint. 'William Thos' was aged 5 and was the son of William aged 34   a Chemical Labourer born in Mold.  Wife Anne aged 35 born in Flint as were all the brothers and sisters of Williama thomas:Mary Elizabeth, 11; Samuel   3; Ellen   1; Martha Ann   9.  The only way to be sure if this is your William thomas would be to look for his birth in GRO and get a birth cert.