I notice Grace and George have a child - ARTHUR CROMMON Hunnam- note the middle name - Graces maiden name ?
Name Arthur Crommon Hunnam
Gender Male
Christening Date 30 Aug 1857
Christening Place St. Hildas, South Shields, Durham, England
Birth Date 09 Aug 1855
Father's Name George Hunnam
Mother's Name Grace
so - is that a mistranscription - or should you look for a birth / baptism of a Grace CROMMON
a little strange naming her son after her first husband - Arthur - I wonder if Arthur died tragically and she named her son after him as a mark of respect for him ??
1871 has Grace as born 1821 and she is aged 50 - born in North Shields ,Northumberland