Fernão Veloso is a historical figure, see João de Barros, Decadas da Asia (1552), Dec. I, Lib. IV, Ch. II, p.283
In English translations, see W.J. Mickle, 1776, The Lusiad, or the discovery of India, an epic poem, p.247, T.M. Musgrave, 1826, The Lusiad, an epic poemp.229; R.F. Burton, 1880, The Lusiadsp.230, and J.J. Aubertin (trans.) 1878-84, The Lusiads of Camoensvol. 2, p. 22
Teófilo Braga (1874: p. 433-34; 1902: p.95, p.298); Pimentel (1891, p.141ff). Curiously, these authors seemed to have overlooked the account of José Soares da Silva, whose 1732 Memórias para a Historia de Portugal (vol. 3, Ch. 281, p.1364), also supplies a complete list as well as a few more details about the twelve. For a rough English translation of Silva's text, see T.M. Musgrave's note in 1826 trans. The Lusiad: An epic poemp.494
José Soares da Silva Memórias para a Historia de Portugal (1732: p.1368). (Musgrave 1826 trans., p.495)
Almada 'o Justador' is wholly omitted and definitively replaced with João Fernandes Pacheco by José da Fonseca in his 1846 Paris edition of Lusiadasp.508. See Pimentel, 1891: p.143.
Corte-Real's presence among the twelve was first proposed by Francisco Soares Toscano in his 1623 Parallelos de Principes e Varoens Illustres, p.193