This is a bit complicated...
FamilySearch has the christening of another daughter for William and Ella: Fortrude
(sic) May AUSTIN, on 22 Nov 1893 in Leyonstone. (FreeBMD has the birth as Gertrude May AUSTIN.)
I think this is her (with the wrong surname) in 1901:
RG13/1760/54/8
The Heath, Hessett, SuffolkWilliam LAMBERT Head 49 Hurdle Maker Thorpe Hamlet, Norwich
Susan LAMBERT Wife 52 Laundress Aylsham, Norfolk
Frederick A LAMBERT Son 17 Woodman Hessett, Suffolk
Gertrude M LAMBERT Grandaughter 7 Leytonstone, Essex
The 1911 free index has Gertrude May AUSTIN apparently still with William and Susan.
However.... on earlier censuses, William and Susan don't have a daughter Ella/Ellen/Naomi living with them

What do you think?
Rambler