Not finding family on 1861 census

1841 census Caellwyngrydd, Llanllechid, Bangor & Beaumaris, Caernarvonshire, Wales
Owen Hughes 1811 Caernarvonshire, Wales occ quarryman
Margaret Hughes 1811 Caernarvonshire, Wales
Owen Hughes 1836 Caernarvonshire, Wales
Margaret Hughes 1838 Caernarvonshire, Wales
William Hughes 1839 Caernarvonshire, Wales
Ellin Hughes 1840 Caernarvonshire, Wales
Could this also be a possibility for marriage

Owen Hughes
Marriage 30 Jan 1836 Llanllyfni,Caernarvon,Wales
Spouse Margaret Owen
I’ve not checked GRO indexes to see if children can be found with mmn Owen or Roberts
ADDED possibility for William & Ellin
HUGHES, WILLIAM Mmn OWEN
GRO Reference: 1838 D Quarter in BANGOR AND BEAUMARIS UNION Volume 27 Page 272
HUGHES, ELLEANOR mmn OWENS
GRO Reference: 1840 J Quarter in BANGOR AND BEAUMARIS UNION Volume 27 Page 309