I'm assuming you got your information from the 1881 census:-
Name Relation Marital Status Gender Age Birthplace Occupation Disability
Edward THOMAS Head M Male 48 St Andrews, Worcester, England Boot Maker
Eliza THOMAS Wife M Female 30 Isle of Man, England
Anne THOMAS Daur U Female 19 St Peters, Worcester, England Reacher In Cotton
Edward THOMAS Son Male 16 St Peters, Worcester, England Packer (C M)
John THOMAS Son Male 14 St Peters, Worcester, England Fitter Iron Foundry
Alice THOMAS Daur Female 11 St Helens, Worcester, England Scholar
Magie THOMAS Daur Female 2 Isle of Man, England
Nellie THOMAS Daur Female 1 Manchester, Lancashire, England
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Source Information:
Dwelling 30 Barlow St
Census Place Bradford, Lancashire, England
Family History Library Film 1341959
Public Records Office Reference RG11
Piece / Folio 4016 / 52
Page Number 38
IF this is their marriage record:
EDWARD THOMAS Spouse: ELIZABETH CARRALL Marriage: 17 DEC 1879 St Nicholas, Great Yarmouth, Norfolk, England [or another marriage in England], could she have had her daughter b.IOM pre-marriage?
Sue