Person, soldier or hunter whose weapon is a crossbow.
The crossbowmen of the king were responsible for the sovereign's guard but could also serve as summary executioners when the occasion arose. This was common practice especially in Castile. See: Antonio Ferrer del Rio, Examen histórico-crítico del reinado de don Pedro de Castilla (Madrid: C. Monier, 1851), p. 28.
The office of 'alcaide' or governor of a castle included military responsibilities, as he was responsible for its defense. It might also include civil administrative duties which could extend over a province, though not as a rule. Compare with Alcaide-mor. (CW)