William Arnold was born 1681 in Warwick, Kent County, Rhode Island to Israel Arnold (1649-1718) and Mary Barker (1649-1723) and died 15 June 1758 Warwick, Kent County, Rhode Island of unspecified causes. He married Deliverance Whipple (1676-1766) 1705 in Warwick, Kent County, Rhode Island.
Children
| Name | Birth | Death | Joined with |
| John Arnold (1705-1801) | |||
| Josiah Arnold (1707-1763) | 25 August 1707 Warwick, Kent County, Rhode Island | 18 September 1763 Newport, Newport County, Rhode Island | Elizabeth Vaughan (1701-1792) |
| William Arnold (1718-) | |||
| Rebecca Arnold (1720-1789) | |||
| Oliver Arnold (1725-1789) | |||
Siblings
| Name | Birth | Death | Joined with |
| Israel Arnold (1677-1753) | 18 January 1677 Providence, Providence County, Rhode Island | 3 August 1753 Warwick, Kent County, Rhode Island | Elizabeth Smith (1672-1718) Dorothy Rhodes Whipple (1681-1723) Elizabeth Stafford (1682-1756) |
| Stephen Arnold (1685-1754) | |||
| Elisha Arnold (1684-1748) | |||
| Sarah Hannah Arnold (1688-1727) | |||
| James Arnold (1689-1777) | |||
| William Arnold (1681-1758) | 1681 Warwick, Kent County, Rhode Island | 15 June 1758 Warwick, Kent County, Rhode Island | Deliverance Whipple (1676-1766) |
| Mary Arnold (1696-) | |||
| Joseph Arnold (1696-1718) | |||
| Barbara Arnold (1699-1737) | |||
| Josiah Arnold (1694-1758) | |||