By the marriage register by Gwynedd family history Owen Roberts was from Bodwrog and his wife from Bodedern. It is also on the census that his wife was born Bodedern.
They married as you stated in Bodwrog on 9th March 1819.
Their son Robert Owen Roberts was christened on 7 Oct 1820 at Bodwrog. Ellin Roberts christened on 10 March 1822 at Llanbedrgoch. John |Roberts christened on 1st June 1833 at Gaerwen C.M. Llanfihangel Esgeifiog born 20 May 1833.
On 1851 census there is an Eliz, Roberts aged 56 b. Llanynghenedl, Bodedern with children John aged 23 and Elizabeth aged 18 both born Bodedern and living at Penrhos, Bodedern. Children born at the wrong place!
If you go on family search you might find some others.
Just google family search. 1871 census says i.e. if Elizabeth Roberts is the same living at Armenia Ter. Gaerwen aged 75 born at Bodedern.
All the best,