William Arnold was born circa 1751 in England, United Kingdom and died 1831 Hinxworth, Hertfordshire, England, United Kingdom of unspecified causes. He married Mary Stocker (c1755-1842) 26 July 1776 in Hinxworth, Hertfordshire, England, United Kingdom.
Children
| Name | Birth | Death | Joined with |
| William Arnold (1776-) | |||
| Elizabeth Arnold (1782-) | |||
| Sarah Arnold (1790-1867) | 1790 Hinxworth, Hertfordshire, England, United Kingdom | 1867 Baldock, Hertfordshire, England, United Kingdom | Thomas Smith (1795-1879) |