All that is known about Francisco de Alcántara is that he was present at the 1540 muster as an unassigned horseman.
1540, Feb: Muster in Flint & Flint, Documents, Document 12 [horse, native arms]
?ARChV, Sala de Hijosdalgo, Caja 649,32 [1549, Pleito de Francisco de Alcántara, vecino de Las Casillas, jurisdicción de Berlanga (Burgos)
?Himmerich, Encomenderos, 116 [Bartolomé de Alcantara, parents: Hernán Martinez and Ana González, 1523 to New Spain from Bembibre: Leon, 4 sons (inheritor Daniel)] [possibly his father?]= Icaza, Diccionario, #496;
?AGI, Pasajeros, L.1, E.3990 [Feb. 25, 1534, Diego de Alcántara, son of Francisco de Alcántara and Inés Díez, vecino of Écija]; [unknown if this was the expeditionary]