He was the grandson of William Lemon (1696–1760), who acquired the family estate at Carclew in 1749. His father, also called William Lemon, married Anne, the daughter of John Williams of Carnanton. Their son, William, later Sir William, was born 11 October 1748.
He was educated at, Oxford and with a Grand Tour.
John Lemon died on 5 April 1814. Their daughter, Anne married John Buller Member of Parliament for West Looe and then Truro, of Morval. He was created Baronet Lemon of Carclew, Cornwall on 24 May 1774.
1st United Kingdom Parliament. 2nd United Kingdom Parliament. 3rd United Kingdom Parliament.
4th United Kingdom Parliament.
5th United Kingdom Parliament. 6th United Kingdom Parliament.
7th United Kingdom Parliament. 13th Parliament of Great Britain.
14th Parliament of Great Britain.
15th Parliament of Great Britain. 16th Parliament of Great Britain. 17th Parliament of Great Britain.
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Lemon"s younger brother John, born 6 November 1754, became a member of parliament for Saltash in 1787, then from 1796 to 1814 for Truro, and was the owner of Pollevillan.
He was Member of Parliament for Penryn 1770–1774 and Cornwall 1774–1824, a total of 54 years.
