Hi Tiff
Detail of the inhabitants of Bwlch Sych, Hirnant in 1861 census:
Humphrey Humphreys (47) farmer, 160 acres, b.Hirnant
Ann Humphreys (45), wife, b.Hirnant
Children; Jane (10), Margaret (

, Mary (6), Catherine (3), Hannah (14m) all born Hirnant
Also Robert Thomas (3), grandson to wife (suggests Ann was married before)
Looking at the 1851 census, this shows additional children:
Humphrey Humphreys (36)
Ann Humphreys (34) - shown as b.Llangynog
Elinor (5), Elizabeth (3) and Jane (8m)
There are 2 servants, one of which is Anne Thomas (12) b.Llangynog (could be Ann's daughter from first marriage ?)
Hope this helps you along
Stan