Hi, I do have the marriage record for Owen Hughes and Margaret Lloyd.
And I have located William Hughes in the 1841 and 1851 census in Llanrhyddlad (where Owen was born).
William Hughes, born abt 1785/86 in Llanynghedl, Anglesey, widower in 1851.
Elizabeth, his wife, born abt 1791, Anglesey.
Children listed - Elinor, Owen, Margret, Winifred, William, John and Robert.
I agree that going beyond William Hughes will be difficult.
Now that I have made 3 posts we should have the option to use the Personal Message (PM) system to exchange personal info. Thanks for the photo. I had trouble getting it to display, but I will try again.