@Tricia_2 Welsh Patronymic naming thing - yes, possible.
The Romans obviously travelled through France/Gaul on their way to Britain so it is likely there is traces of J2 DNA to be found in some of the Norman entourage that came here at the time of William I.
Imagine later Normans settling in the Welsh Marches townships such as Montgomery (named after Roger de Montgomery - founder of Shrewsbury Abbey). After a few years some may adopt the patronymic naming customs of Welsh locals, so a son of John (Ioan) becomes ap Ioan then later Jones.
Others may travel and be called by a locative name of their origin, so a lowly Henry who happens to come from Montgomery becomes known as Henry of Montgomery or Henry de Montgomery and finally Henry Montgomery - although there may be no direct relationship to Earl Roger or the Norman area of Montgomerie in France.
It's one area where DNA wins because the DNA stays constant and immutable, surnames can and do change - for that reason I am reasonably fluid if the DNA matches but the surname doesn't. However I don't get many matches in the UK with J2-L26.
The problem with patronymic names is that the ability to trace back the generations disappears after two generations unless you have a solid paperwork trail. You need a land owning farmer in the family with the appropriate title deeds and family history - something I lack.
Best of luck, pob lwc.
