Definitions for "caballero"
A knight or cavalier; hence, a gentleman.
knight (Castillan unlanded noble title)
Horseman. Used much as in polite English for "gentleman " (Spanish, from Late Latin caballarius hostler)
Normally the highest part of a fort or Castle giving a high vantage point from which to observe the actions of the enemy. It could include embrasures or covered emplacements for cannons. High point - a point from which shots could be fired at both low and high trajectories.
Member of the lowest level of the knightly class, acquiring status and tax exemptions by the ownership of a horse and its use in combat. The caballero villano were members of the class with established households in towns.
Keywords:  horseback, man
Man on horseback.