Brigham’s parentage has not been established beyond reasonable doubt, but it is highly likely that he was a son or other close kinsman of William Brigham, who had served Edward Courtenay, earl of Devon, as his receiver-general in the late 1370s and early 1380s.
There is nothing to suggest that John stood out among the Courtenay men in the Commons at that time, and on his return he apparently resumed his duties in the comital household at Tiverton. As one of the earl’s trusted retainers he may well have been among the army of tenants and followers whom Courtenay assembled in the autumn of 1451 to meet his old adversary, William, Lord Bonville*, in a campaign which culminated in the siege of Taunton by the earl’s troops, but was cut short by the duke of York’s intervention.
When Earl Thomas died unexpectedly in 1458, Brigham probably transferred his allegiance to the new earl, Thomas Courtenay the younger. No evidence of his position in this earl’s household has been found, but after Courtenay’s capture and execution after the battle of Towton, Brigham rose to prominence under his brother Henry, to whom King Edward returned some of the Courtenay family estates. He was to serve as Henry’s receiver at least to the mid 1460s, and probably right up to Henry’s execution in January 1469. In return for his good services, Courtenay granted him a not insubstantial holding of some 300 acres in Stedcombe in Axmouth. Although Courtenay had been found guilty and executed for treason, there may have been sufficient doubt over his guilt to prevent the King’s wrath from extending to the dead man’s servants. Thus, Brigham was allowed to retain his land, and only the reversion thereof was granted away in January 1470 to pay some of the King’s debts.
