Sir Nicholas Brembre, Lord Mayor of London

Sir Nicholas Brembre was a wealthy magnate and a chief ally of King Richard II in 14th-century England. He was Lord Mayor of London in 1377, and again from 1383-5. Named a "worthie and puissant man of the city" by Richard Grafton (who wrongly termed him a draper), he became a citizen and grocer of London, and in 1372-3 purchased (46 Ed. III) from the Malmains family the estates of Mereworth, Maplescomb, and West Peckham, in Kent. His ties to Richard ultimately resulted in his downfall, as the anti-Richard Lords Appellant effectively took control of the government and imprisoned, exiled, or executed most of Richard's court. Despite Richard's efforts, Brembre was executed in 1388 for treason at the behest of the Lords Appellant.

Nicholas Brembre, Wikipedia

The Lords Appellant were a group of nobles in the reign of King Richard II, who, in 1388, sought to impeach some five of the King's favourites in order to restrain what was seen as tyrannical and capricious rule
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They achieved their goals, first establishing a Commission to govern England for one year from 19 November 1386. In 1387, the Lords Appellant launched an armed rebellion against King Richard and defeated an army under Robert de Vere, Earl of Oxford at the skirmish of Radcot Bridge, outside Oxford. They maintained Richard as a figurehead with little real power.
They had their revenge on the king's favourites in the "Merciless Parliament" (1388). The nominal governor of Ireland, de Vere and Richard's Lord Chancellor, Michael de la Pole, Earl of Suffolk, who had fled abroad, were sentenced to death in their absence. Alexander Neville, Archbishop of York, had all his worldly goods confiscated. The Lord Chief Justice, Sir Robert Tresilian, was executed, as were Sir Nicholas Brembre, Lord Mayor of London, John Beauchamp of Holt, Sir James Berners, and Sir John Salisbury.

Lords Appellant, Wikipedia