Mary Ann Boniface was born 1821 in Slaugham, Sussex, England, United Kingdom to George Boniface (1794-1863) and Philadelphia Dinnage (1798-1846) and died 3 February 1845 Warninglid, Slaugham, Sussex, England, United Kingdom of unspecified causes. She married John Walder (1820-1876) 24 August 1839 in Lower Beeding, Sussex, England, United Kingdom.
Children
| Name | Birth | Death | Joined with |
| Mary Ann Walder (1839-1886) | 2 December 1839 Warninglid, Sussex, England, United Kingdom | 14 November 1886 25 Evelyn Buildings, Holborn, London, England, United Kingdom | Thomas Roberts (1813-1889) |
| Harriet Walder (1842-1876) | |||
Siblings
| Name | Birth | Death | Joined with |
| George Boniface (1818-1887) | 1818 Lower Beeding, Sussex, England, United Kingdom | 1887 | |
| Mary Ann Boniface (1821-1845) | 1821 Slaugham, Sussex, England, United Kingdom | 3 February 1845 Warninglid, Slaugham, Sussex, England, United Kingdom | John Walder (1820-1876) |
| Several others | |||