are Elizabeth and Peter twins??

1861UKC PeterLedgerFam England Census Durham Waldridge District 5; image 7 of 40 @ancestry.com;
Source Citation: Class: RG 9; Piece: 3759; Folio: 79; Page: 6; GSU roll: 543183
Source Information: Ancestry.com. 1861 England Census [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2005.
Name: Peter Edger; Gender: Male
Age: 45; Estimated birth year: 1816
Where born: Chatershough, Durham, England
Relation: Head
Spouse's Name: Elizabeth Edger
Civil Parish: Waldridge
County/Island: Durham
Country: England
Registration district: Chester Le Street
Sub-registration district: Chester le Street
ED, institution, or vessel: 5
Household schedule number: 22
Piece: 3759; Folio: 79; Page Number: 6
Household Members:
Peter Edger 45
Elizabeth Edger 33
Ann Edger 11
George Edger 9
Elizabeth Edger 7
Jane Edger 5
Rebecca Edger 3
Peter Edger 7

not with family on 1871UKC