Mary was second daughter of Andrew Campbell and his wife Mary McMahon (sometimes transcribed as McMahon - She was born in Monaghan in approximately 1846.
She is found in the England census of 1851 in Sunderland, County Durham, England. That census also shows other siblings who were born in Sunderland - Catherine b1849, Ann b1850, Catherine b 1853 and James b 1855
| Additional Information | ||
|---|---|---|
| Father (First Name/s and Surname) | Andrew Campbell | |
| Mother (First Name/s and Maiden) | Mary McMahon | |
| Townland born | Monaghan | |
| Names of Siblings | Catherine and James | |
