Do you have them on the 1851 census - what actual birthplace is shown? I have found a possible match on the 1851 - Joseph b Middlewich and Eliza - not Elizabeth b Knutsford but they only have one child aged 4 weeks
Just found them in 1861 - living in Shropshire
Joseph Wright 44 b Wrenbury - cattle dealer
Elizabeth 42 Tilstone Hall
Elizabeth 17 b Wrenbury
Henry 15 b Wrenbury
Joseph 13 b Salop Whitchurch
William 10 b Salop Whitchurch
Rhoda 6 b Salop Whitchurch
Alice 4 b Salop Whitchurch
Clara 1 b Salop Whitchurch
Elizabeth Fenna 70 b Tarporley mother in law
RG9 Piece 1889 Folio 103 Page 10
In 1851 - Elizabeth Fenna is with her daughter & family in Cheshire - John & Alice Young
JOHN YOUNG Spouse: ALICE FENNAH Marriage: 13 FEB 1834 Bunbury, Cheshire