Parents

• James Wemyss Lord Burntisland (?–1682)
• Margaret Wemyss Countess (1659–1705)

Spouses

• Anne Douglas Lady (?–1700)
• Mary Robinson (?–1712)
• Elizabeth Sinclair (?–1721)

Siblings

• Anne Wemyss (1675–?)
• Margaret Wemyss (1677–1763)
• John Wemyss d.inf. (1680–?)
• William Wemyss Col. (1681–1715)
• Catherine Wemyss d.yng (1682–?)

Children

• David Wemyss Lord Elcho (1698–1715)
• James Wemyss 4th Earl (1699–1756)
• David Wemyss d.yng? (1716–?)
• Elizabeth Wemyss (1721–1747)
• Margaret Wemyss (1721–1779)

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