- Sir Eustace d'Ambreticourt, though only identified as Sir Eustace in Fernão Lopes's Chronicle of King Pedro of Portugal. [Pedro, ch. 36: 18]
- Was part of the English contingent accompanying Enrique Count of Trastámara in his campaign into Castile to wrestle the crown from Pedro of Castile in 1366. See: Daniel Gurnay, The record of the house of Gournay, (London, 1848), p. 671.
Estacio