Sir Thomas de Ashton or Assheton (fl. 1446), was an English alchemist.
Ashton was born in 1403, the son and heir of Sir John de Ashton, of Ashton-under-Lyne, who died in 1428. His half-brother Ralph de Ashton seems to have inherited the main family home, Ashton Hall. From roughly this date, differences appear in the coat of arms, motto and spelling of the two families, indicating that Sir Thomas may have distanced himself from his unpopular half-brother.
Permission was granted by Henry VI to Sir Thomas to transmute the precious metals, and on 7 April 1446 a special order was issued,encouraging two Lancashire knights, Ashton and Sir Edmund de Trafford, to pursue their experiments in alchemy, and forbidding any subject of the king to molest them.
Sir Thomas, born in Kingsley, Lancashire, England, married Elizabeth, daughter of Sir John Byron, by whom he had eleven children. The eldest son, John, was knighted before the battle of Northampton, 10 July 1460, was MP for Lancashire in 1472 and died in 1508.
Elizabeth, b. 1431, married John Trafford Knight, d. 1488; Douce, b. 1435, married Thomas (Sir) Gerard Knight, born 15 July 1431 in Kingsley, Lancs, England, died 27 March 1490 in Kingsley, Lancs., England
Thomas de Ashton (alchemist) is not, Sir Thomas de Ashton Lord of Croston d. 17 Oct 1407 and, is not the medieval Thomas de Aston, a 13th-century monk d. 7 June 1401: these two men are in Lincoln Cathedral.
Heritage Consulting. Millennium File [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2003. Original data: Heritage Consulting. The Millennium File. Salt Lake City, UT, USA: Heritage Consulting.
Sir John Say was an English courtier, MP and Speaker of the House of Commons.
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Sir John de Ashton, or Assheton, of Ashton-under-Lyne, Lancashire, was an English politician and military commander. He was the son of Sir John Ashton, who was reportedly a prominent soldier and died c. 1360).
Sir Robert de Ashton, also called "Robert Assheton" or "Robert de Assheton", was a civil, military, and naval officer under Edward III of England who achieved distinction alike in court and camp, by land and by sea.
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. Dictionary of National Biography . London: Smith, Elder & Co. 1885–1900.