Joannes
A gold coin of Portugal, first issued in 1722 under John V from which ruler it obtains it name. Conf. Dobra ; and for an account of its underrating see Chalmers, History of Currency in the British Colonies. 1893. (pp. 82, 396).
Source: Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)