Baptism certificate gives maiden name, but that's all I know. On one census(1881 Parr,Lancashire, England) Patrick Marr was living with them, and I thought he might be her brother.

Elizabeth by census was born 1855.
They moved from Lancashire to Durham when their son, Matthew was born.

birth: 07 Jan 1883 St. Patrick, Sunderland, Durham, England
residence:1883 Sunderland, Durham, England

parents:Roberti Crilly, Elizabettae Meagher Crilly
name: Matthaeus Franciseus Crilly
gender: Male
birth date: 07 Jan 1883
birthplace: St. Patrick, Sunderland, Durham, England
father's name: Roberti Crilly
mother's name: Elizabettae Meagher Crilly