John Beaumont, 4th Baron Beaumont

He accompanied John of Gaunt to Spain in the attempted conquest of Castile in 1386.

He was appointed Admiral of the North from 20 May 1388 – 22 June 1389 jointly with Sir John Roches.

From 23 June 1389 until 22 March 1390, Admiral Lord Beaumont held the office solely.

In 1392 he was appointed Constable of Dover Castle and Lord Warden of the Cinque Ports.

In 1393 he was created a Knight of the Garter and was one of the Ambassadors to France to demand Princess Isabella in marriage for King Richard II.

Arms of Beaumont: Azure semée of fleurs-de-lis , a lion rampant or [ 1 ]
Effigy presumed that of Elizabeth Beaumont, daughter of John Beaumont, 4th Baron Beaumont. She became the 1st wife of William de Botreaux, 3rd Baron Botreaux . North Cadbury Church, Somerset
Heraldic escutcheon incised on tombstone of Reginald de Botreaux (d.1420), died young, whose mother was Elizabeth Beaumont, daughter of John Beaumont, 4th Baron Beaumont. Aller Church, Somerset. It shows the impaled arms of his parents: Baron: Argent, a griffin segreant gules armed azure (Botreaux); Femme: Azure seme of fleurs-de-lis a lion rampant or (Beaumont)