Azure a bend argent coticed Or between six lions rampant Or
The above blazon is from the Herald's Roll, number 46 for the Count of Hereford, Humphrey Bohun, at http://www.briantimms.net/era/heralds/heralds01/Heralds01.htm
Thanks to Brian Timms for his comprehensive collection of Shield of Arms, and his generosity to share it.
Our tree is a work in progress, and today I discovered another Magna Carta Baron on Leo's branches:
Sir Henry de Bohun, 1175-1220, 5th Baron of Hereford, 1st Earl Hereford, Constable of England, Sheriff of Kent. He died in the Holy Land, 1 June 1220.