William Duff was born circa October 1697 in United Kingdom to William Duff of Dipple (1653-1722) and Jean Gordon (c1653-) and died 30 September 1763 Rothiemay, Banffshire, Scotland, United Kingdom of unspecified causes. He married Janet Ogilvie (c1695-1720) 19 September 1719 in Cullen, Banffshire, Scotland, United Kingdom. He married Jean Grant (1705-1788) 1723 in United Kingdom.
Children
| Name | Birth | Death | Joined with |
| William Duff (1724-1753) | |||
| Anne Duff (1725-1805) | |||
| Janet Duff (1727-1758) | |||
| James Duff, 2nd Earl of Fife (1729-1809) | |||
| Alexander Duff, 3rd Earl of Fife (1731-1811) | 18 April 1731 | 17 April 1811 Banff, Banffshire, Scotland, United Kingdom (Duff House) | Mary Skene (c1731-) |
| Jane Duff (c1732-1776) | |||
| George Duff (1736-1828) | |||
| Lewis or Ludovic Duff (1737-1811) | |||
| Patrick Duff (1738-1738) | |||
| Helen Duff (1739-1778) | 1739 | 20 November 1778 Gibraltar | Robert Duff (1721-1787) |
| Sophia Duff (1740-1826) | |||
| Catherine Duff (1741-1765) | |||
| Arthur Duff (1743-1805) | |||
| Margaret Duff (1745-1786) | |||
Residences
Footnotes (including sources)
| ‡ General |
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| Ω Birth |
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