In 1881, Mary is living with her parents, James (b1843, Preston) and Ann E (b1846, Ince) Billington and her brother, James Billington (b1879, Wigan). Mary is listed as Mary Alice Billington.
In 1891, Mary is again living with her parents, James and Annie E Billington and 2 brothers, James Billington and Harry Billington (b1886, Oldham). Mary is listed as Mary A Green as she was born before her parents were married. She may not be James' daughter.
The Marriage Records show Mary's surname as Green.
In 1901, Mary A and her family were living with her parents, James and Ann E Billington and her brother, Harry.
In 1911, Mary's widowed mother, Ann Elizabeth Billington is again living with Mary and her family. This census also shows that John and Mary had 5 children prior to the census but one did not survive to that date.
Sources
↑Marriage: Title: Marriage Record, Lancashire BMD,website Italicized: Y Paranthetical: Y. Citing: Page: Ref No C36/2/357 Note: Lancashire BMD website gives name of church, St James & St Thomas CofE, Poolstock,Wigan, and year 1898, confirmed on St Catherine's Index Dec qtr 1898, Wigan 8c 151 (accessed before 9 April 2012)