Religion is a possible link to nationality, but in the US gets less and less meaningful as we approach the present day. In the past, a Scot may have been Presbyterian and a Welshman Methodist, but in the modern day it can come down to which minister the family prefer, for example. IOW, if you know what religion they were in 1729, that may carry some weight, but if you scramble those digits to, say, 1972, it is likely to mean very little indeed.