Bridson is fairly uncommon in German - in 1851 census at German bk 1. page 13 entry 36 are Thomas & Ann Bridson (age 40 + 27, children Robert 4, Ann 7 (thus I would expect next child to be thomas - as suspect thomas's father was robert and ann's mother ann - however it would appear they christened their children in the adjacent parish of Kk Patrick - there is a Thomas B. ch 07 MAR 1852 at Patrick apparently to this family, who don't appear to be in 1861 census