Frederick Irby was born on 9 June 1749, the son of William Irby, 1st Baron Boston and Albinia Selwyn. He succeeded his father as 3rd Baronet Irby, of Whapload and Boston and 2nd Baron Boston, on 30 March 1775. He married Christian Methuen, daughter of Paul Methuen and Catharine Cobb of Corsham Court, Wiltshire, on 15 May 1775.
He graduated from Oxford University on 8 July 1763 with a Doctor of Civil Laws (Data Control Language), and from Saint John"s College, Cambridge, in 1769 with a Master of Arts (Master of Arts).
The Captain In 1778, Irby built a new mansion at his estate at Hedsor House, near Taplow, Buckinghamshire. An amateur etcher, Irby was invested as a Fellow of the Society of Antiquaries (Federal Security Agency) on 8 January 1778. In later life he was a courtier, holding the office of Lord of the Bedchamber to both George III and George IV, from 1780 until his death in 1825.
Irby died on 23 March 1825, aged 75, at Lower Grosvenor Street, Mayfair, London.
His widow died on 9 May 1832.
