Humphrey (VI) de Bohun, 4th Earl of Hereford (1276 – 16 March 1322) was a member of a powerful Anglo-Norman family of the Welsh Marches and was one of the Ordainers who opposed Edward II's excesses.
Humphrey de Bohun's birth year is uncertain although several contemporary sources indicate that it was 1276. His father was Humphrey de Bohun, 3rd Earl of Hereford and his mother was Maud de Fiennes, daughter of Enguerrand II de Fiennes, chevalier, seigneur of Fiennes. He was born at Pleshey Castle, Essex.
Humphrey (VI) de Bohun succeeded his father as Earl of Hereford and Earl of Essex, and Constable of England (later called Lord High Constable). Humphrey held the title of Bearer of the Swan Badge, a heraldic device passed down in the Bohun family. This device did not appear on their coat of arms, (az, a bend ar cotised or, between 6 lioncels or) nor their crest (gu, doubled erm, a lion gardant crowned), but it does appear on Humphrey's personal seal (illustration).
Humphrey was one of several earls and barons under Edward I who laid siege to Caerlaverock Castle in Scotland in 1300 and later took part in many campaigns in Scotland. He also loved tourneying and gained a reputation as an "elegant" fop. In one of the campaigns in Scotland Humphrey evidently grew bored and departed for England to take part in a tournament along with Piers Gaveston and other young barons and knights. On return all of them fell under Edward I's wrath for desertion, but were forgiven. It is probable that Gaveston's friend, Edward (the future Edward II) had given them permission to depart. Later Humphrey became one of Gaveston's and Edward II's bitterest opponents.
He would also have been associating with young Robert Bruce during the early campaigns in Scotland, since Bruce, like many other Scots and Border men, moved back and forth from English allegiance to Scottish. Robert Bruce, King Robert I of Scotland, is closely connected to the Bohuns. Between the time that he swore his last fealty to Edward I in 1302 and his defection four years later, Bruce stayed for the most part in Annandale, rebuilding his castle of Lochmaben in stone, making use of its natural moat. Rebelling and taking the crown of Scotland in February 1306, Bruce was forced to fight a war against England which went poorly for him at first, while Edward I still lived. After nearly all his family were killed or captured he had to flee to the isle of Rathlin, Ireland. His properties in England and Scotland were confiscated.