- According to Fernão Lopes this is a knight who, in response to the appeal made by Lourenço Eanes Fogaça and the Master of Santiago, ambassadors sent to London on behalf of the Master of Avis, loaned three thousand five hundred pounds to pay the wages of the troops who enlisted to go to Portugal in 1383 and fight against Castile.
- It is difficult to identify this person from Fernão Lopes's spelling as 'Amrrique Bivembra' in The Chronicle of King João I, Part 1, Chapter 47. Jorge Almeida in Crónica do Reinado e Regência de D. João I, suggests that he might be the merchant Henry Vanner, a vintner and alderman between 1391 and 1394.
- Bibliography: Jorge Almeida (ed.), Crónica do Reinado e Regência de D. João I (V. N. Famalicão: Edições Humus, 2015), p. 120, note 5; Sylvia L. Thrupp, The Merchant Class of Medieval London, 1300-1500 (Ann Arbor: University of Michigan Press, 1989), p. 371.