I looked up this family on the older post. Feel I should say that the 1841 census does
not show relationships & it can be confusing to assume.
Thomas Bowen married Dinah Jones 8/6/1832 in Llanllwni, Carmarthenshire
http://www.freereg.org.uk/cgi/SearchResults.pl?RecordType=Marriages&RecordID=32535321851 census shows them in Llanybyther
Tanygraig HO107/2483 folio 66 pg 30
Thomas Bowen head mar 47 ag lab b. Llanllwni
Dinah wife 36 b. Llanllwni
Mary dau 23 b. Llanllwni
Rachel dau 14 b. Llanybyther
Susannah dau 10 b. Llanybyther
Thomas son 8 b. Llanybyther
William son 3 b. Llanybyther
1861 Tangraig Tavern, Llanybyther RG9/4816 folio 5 pg 4
Thomas Bowen head mar 56 publican b. Llanllwni
Dinah wife 46 b. Llanllwni
Susannah dau 20 b. Llanybyther
William son 10 b. Llanybyther
It looks like Thomas must have been married before and had Esther and Mary with his first wife. 1851 has 1851 with her grandfather & probably the father of the first wife
1851 Waunfawr, Llanllwni HO107/2483 folio 6 pg 4
Evan Williams head widower 79 retired farmer
Ester Bowen grand dau 21 general servant
both born Llanllwni
so possibly this is the earlier marriage
http://www.freereg.org.uk/cgi/SearchResults.pl?RecordType=Marriages&RecordID=3253494Evan's will is on the NLW website in 1853 & has grand daughters Mary & Esther Bowen among the legatees
http://cat.llgc.org.uk/cgi-bin/gw/chameleon?skin=profeb&lng=en