Josiah Arnold was born 25 August 1707 in Warwick, Kent County, Rhode Island to William Arnold (1681-1758) and Deliverance Whipple (1676-1766) and died 18 September 1763 Newport, Newport County, Rhode Island of unspecified causes. He married Elizabeth Vaughan (1701-1792) 27 December 1716 in Rhode Island.
Children
| Name | Birth | Death | Joined with |
| Susanna Arnold (1719-) | |||
| Dorcas Arnold (1721-) | |||
| Josiah Arnold (1723-1811) | |||
| Joseph Arnold (1725-1801) | 22 June 1725 Warwick, Kent County, Rhode Island | 28 August 1801 Rhode Island | Anne Lockwood (1730-1772) |
| Elisha Arnold (1727-1727) | |||
| Christopher Arnold (1729-) | |||
| Lydia Arnold (1734-) | |||
| Margaret Arnold (1735-) | |||
| Waite Arnold (1740-1820) | |||
| Jesse Arnold (1742-1816) | |||
| David Arnold (1742-1816) | |||
| Sarah Arnold (1748-1806) | |||
Siblings
| 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) | |||