I would not say that you can take it that you have the burial of the right
children at all. I do not wish to foment an argument on line and so I hope
that listers, especially Angharad (for whose opinions I have the greatest
respect), do not take my comments the wrong way...
I think all that you can do is understand the patronymic naming system and
note these names from the PR noting they could very well be children of your
man but also might not be.
In a way this is one of the great joys of genealogy (and also its pitfalls
in Wales!) - uncertainty - that although you don't have any proof yet of a
connection, you learn a little more about the time by the understanding of
how the heck surnames changed generation on generation! Building up a
little more proof in the ways I have described - if possible - is a great
hunt!
I would add to my previous email that estate rentals can provide a sort of
census for an area if you realise that a number of estates may have covered
Llanuwchllyn.
Although other's have replied I thought I would add the following
bit of
information.
I think you can take it that you have the burial of th right children. This
patronymic system was quite usual in Wales before they adopted English
habbits!