Source: Marriage record in 1st Garvagh. A Robert Gray and a James Gray witnessed the marriage.
BB has found this woman and her husband, Joseph, living with their son Charles, and his children, in Philly, in the 1850 US census.
BB says, "Joseph Gray's wake was held at his son in law's house - Thomas Crowe - so that explains why Susannah, his wife, went to live with the Crowes, after his death!! Annie, then, Thomas H. Crowe's wife is another child of Susannah and Joseph Gray!!!"
1850 United States Federal Census
Name:Charles Grey
Age:35
Birth Year:abt 1815
Birthplace:Ireland
Home in 1850:Moyamensing Ward 3, Philadelphia, Pennsylvania
Gender:Male
Family Number:394
Household Members:Name
Age
Charles Grey 35 sawyer b in Ire
Joseph Grey 10
Sarah Gray 30
Sarah J Gray 5
Susanna Gray 1
Charles Gray 3
Joseph Gray 69 b in Ire
Shusanna Gray 67 b in Ire
1860 Census
Family appears to have been missed or badly mispelled
1870 Census
BB: The wrong image is attached to his name on A.com but on Familysearch it shows his family in the 2nd enumeration next door to the Crowes who are housing Susanna Brewster Gray.