According to a pedigree entered in the Heralds' Visitation of Devon in 1620, Thomas Mohun of Tavistock then living was son of Thomas, son of Thomas, serjeant-at-arms to Henry the Eighth, son of Thomas, son of Thomas, son of Lawrence one of the younger sons of Sir John Mohun of Dunster, who is otherwise known to have died in 1330. It is, however, very unlikely that six generations covered three centuries.
THOMAS MOHUN, the serjeant-at-arms, married Agnes daughter of William Amadas, who married secondly Thomas Stoford of Dolton, thirdly John Charles, and fourthly William Abbot of Hartland, who died in 1570.
THOMAS MOHUN, son of Thomas and Agnes, married Joan daughter of William Kedley (or Ridley) alias Pointer, and had issue:—
THOMAS MOHUN, son of Thomas and Joan, living in 1620, married firstly Grace, daughter of Richard Singleton of Truro, and by her had issue:—
He married secondly, in October 1614, Joan daughter of John Harris and had issue:—
This section is founded upon the pedigrees given in Vivian's Visitations of Devon (pp. 1, 12, 168, 321, 566, 574, 712), which furnish some particulars not to be found in the original MS.