Braybrooke was the son of Sir Gerard de Braybooke of Castle Ashby, MP for Northampton of Horsenden, Buckinghamshire & Colmworth, Bedfordshire and his wife, Isabella, the daughter of Sir Roger Dakeny of Clophill.
[1] Braybrooke was a trained lawyer who became the first keeper of the King' signet ring on the accession of the ten-year-old Richard II to the English throne in July 1377.
[2] Whereas the Great Seal had been used to endorse the documentation of the Royal pardons Richard II offered the peasant rebels when he met them at Mile End to diffuse the Peasants' Revolt shortly before his coronation.
[4] Braybrooke was named Lord Chancellor of England on 20 September 1382 and was out of the office by 11 July 1383.
His tomb was smashed during the Great Fire of London in 1666, and his body was found inside intact and mummified.