Hi Mair
Thanks for that
did I mention not expert. Funnily enough I understand what you mean, however thought that kind of thing only happened hundreds of years ago when people only had first name. Only way going to prove if William was William & Mary's son is to find Church records, probable Shiloh. Does anyone know where I'd find them? Tried to find Bangor & Carnarvon BMD/records office last night on net & is it me is there one, couldn't find one. Found Anglesey seems very helpful are they there. Remember something about Bangor University, can you conntact them or are you allowed to research there. My family didn't make it easy for me to trace
Thanks for help really appreciate it
Ok there is a hotch potch of information out there but you must remember that BMD was not a legal requirement until 1875 and it had started back in 1837 - so that was nearly 40 years worth of incomplete records.
www.freebmd.org.uk Parish churches were required to record baptisms and marriages and burials but the non conformists were not really and there are some chapels with great records and some with not so great. The National Archives state that Gwynedd archives have the Shiloh records from 1857 - 1986.
Also at the Records office in Caernarfon will be the Penrhyn estate papers BUT the leases are held at Bangor University Archives. which may have to whom and for how much the farm was leased for from the Penrhyn estate.
www.nationalarchives.gov.uk (search on the site for Penrhyn)
As to the patronymic thing - well - until my ggggrandfathers death in 1850 his son was known as John Thomas and is recorded as such in the 1841 census and then in the 1851 census is suddenly John Rowlands again.......thankfully he was at the same farm! However his cousins from the Rowlands line (ie in todays society they should be Rowlands) we have Jones, Davies, Roberts and Williams from Beddgelert to Llanberis and the Llyn - following them during the "change of name" was a nightmare! Thanks to John, David, Robert, William and Thomas Rowland -5 Rowland's brothers back in the early C19th century we ended up with 5 surnames in the late C19th onwards.

The search for family continues

I hope you gain as much from your search as I did and do from mine.
Mair