Mary Wells Arnold was born circa 1673 in Haddam, Middlesex County, Connecticut to James Wells (c1642-1697) and Elizabeth Clark (1650-1712) and died 4 December 1714 Haddam, Middlesex County, Connecticut of unspecified causes. She married Joseph Arnold (1671-1712) in Connecticut.
Children
| Name | Birth | Death | Joined with |
| David Arnold (1694-1747) | 1694 Haddam, Middlesex County, Connecticut | 20 October 1747 East Haddam, Middlesex County, Connecticut | Sarah Tyler (1697-1736) |
Siblings