I have also managed to find Llwyn y pied in 1851. There is an Eliezer Evans age 32 and his wife Emiah (Rees) there, married 06 Apr 1841, Llanarthney. I did consider if they were related Mary Evans as Eliezer’s father is also a John Evans who was a General Labourer of Tower Lodge born abt 1781. Eliezer is with his parents and various other siblings in 1841 but no sign of Mary, Jane or Thomas with them, which makes me think there is no direct relationship between Eliezer, Mary, Jane and Thomas, though there maybe some other connection