According to the Nottinghamshire antiquarian, Robert Thoroton, Byron was descended from Ralph de Buron, recorded in the Domesday Book as holding eight manors in Nottinghamshire. The first member of the family to enter Parliament was apparently Richard ‘Biron’, who was returned for Lincolnshire in 1322, and in 1478 John Byron represented Nottinghamshire.
Byron entered Parliament in 1624 on his return from his travels ‘a very fine gentleman ... perfectly versed’ in French and Italian,
It was presumably Byron’s debts that kept him off the commission of the peace, although he did serve as sheriff of Nottinghamshire, in which capacity he eventually succeeded in collecting all the Ship Money due under the first writ.
Lucy Hutchinson, who married Byron’s cousin John Hutchinson†, wrote that Byron was ‘bred up in arms’,
Charles I appointed Byron lieutenant of the Tower in December 1641, but he resigned his position a few months later after becoming caught up in the growing political crisis. In July 1642 he was appointed commander of one of the cavalry regiments in the king’s army, and subsequently commanded the cavalry reserve at the battle of Edgehill (23 Oct.), when his precipitous pursuit of the parliamentarian horse left the royalist infantry unsupported and helped deny the king a decisive victory. Elevated to the peerage in October 1643, with a special remainder to his brothers, who also fought for the king, he was appointed to command the royalist forces in the north-west the following December. However he was defeated at Nantwich on 25 Jan. 1644 and forced to withdraw to Chester. He joined up with Prince Rupert’s forces in May and marched with the latter into Yorkshire, where he commanded the royalist right flank at Marston Moor on 2 July. After attacking numerically superior parliamentarian forces his troops were routed. He subsequently retreated to Chester, which he commanded for the king until being forced out in February 1646, when he retired to Caernarvon. Faced with opposition from the war-weary north Wales gentry he abandoned his command in June 1646 and went into exile, remaining abroad for the rest of his life, although he briefly returned in a futile attempt to raise North Wales for the king in 1648. Given a post in the duke of York’s household, he died in Paris in August 1652. No will or administration has been found. The next member of the family to sit in the Commons was the Hon. William Byron, elected for Morpeth in 1775. William Dobson painted Byron’s portrait in 1643, which survives in a private collection.
