| Person Source | | Mary Ellen O'Brien had person sources.1 |
| Birth | 1902 | She was born in 1902 in PennsylvaniaBG. |
| Residence | 1920 | She lived Relation to Head: Daughter; Residence Marital Status: Single in Philadelphia Ward 40, Philadelphia, Pennsylvania, USABG, in 1920. |
| Marriage | 1927 | Hubert Franklin McRee and she were married in 1927 in Philadelphia, Philadelphia, Pennsylvania, USABGO.1 |
| Residence | 1930 | She lived Marital Status: Married; Relation to Head: Wife in Philadelphia, Philadelphia, Pennsylvania, USABGO, in 1930. |
| Death | 1977 | She died in 1977 at age ~75 in Sharon Hill, Delaware, Pennsylvania, USABG. |