Looking back at your other posts re Mary and now looking at censuses, I think she is likely to be the daughter of Samuel and Elizabeth here:
1861 2036 / 26 / 2
Mary Griffith 5 yrs born Tipton and living Wednesbury
1871 2988 / 79 /38
Mary Griffith 14 yrs b Tipton living Wednesbury
Princes End is in Tipton
By 1881 Her family are in Derby and she is married.
Her brother Samuel
Griffin is married to Hannah Rogers (haven't checked for a relationship)
Samuel and Hannah have a nephew Samuel Griffin 7 yrs b Derbyshire
In a later census brother Samuel is shown as born Princes End.
Heywood