Hi Richard and Roy,
Thanks both for such an interesting Chat. I have just joined and this is my first post.
I found Jonathan Rees in 1861 with his married sister Margaret Bowen and older brother John at Llangynwyd, Glamorgan:
1861 Census. At 44 Grove Street Llangynwyd Higher, Llangynwyd Margam Glamorgan with brother-in-law Henry Bowen (31) Blacksmith, sister Margaret (28), their daughter Elizabeth (2) and single brother John Rees (23) Iron Puddler, Jonathan, scholar, aged 10.
Richard, can you confirm that John's daughter Elizabeth, born 1840, married master mariner Daniel Thomas and had children Elizabeth Margaret, Hannah Kate and Cornelius Rees Thomas?
Happy New Year to you both,
Howard