Born at Stanlake Park at Ruscombe in Berkshire, Braybrooke was the son of Richard Griffin, 2nd Baron Braybrooke, and Catherine, daughter of Prime Minister George Grenville. His father had inherited the barony as well as Audley End from his kinsman, John Whitwell, 4th Baron Howard de Walden and 1st Baron Braybrooke, in 1797.
He was educated at Eton and Christ Church, Oxford, also taking a degree as nobleman at Magdalene College, Cambridge.
Richard Griffin between 1797 and 1825, was a British Whig politician and literary figure. In 1797 he assumed, alongside his father, by Royal licence the surname of Griffin in lieu of his patronymic. Braybrooke was returned to Parliament for Thirsk in 1805, a seat he held until 1806, and then represented Saltash in 1807, Buckingham between 1807 and 1812 and Berkshire between 1812 and 1825.
The latter year he succeeded his father in the barony and took his seat in the House of Lords.
Lord Braybrooke married Lady Jane, daughter of Charles Cornwallis, 2nd Marquess Cornwallis, in 1819. She died in September 1856, aged 57.
Lord Braybrooke survived her by two years and died at Audley End in March 1858, aged 74.
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