hi Weasel1

do you have the other 11 children born to a couple with those names ?
all baptised abbotshall , looks like katherine was a twin
i to can't see a marriage for the parents
however if you check the marriage records for abbotshall on the IGI
batch number M113997 there are a few aitken marriages around 1780
some of which have the same christian names as the children
ev