Knight-villein
A knight-villein (Cavaleiro-vilão in Portuguese, caballero villano in Spanish) was a free plebeian horsemen who owned land, weapons and a horse, despite not being part of the nobility, being prominent in medieval Portugal, Castile and Leon. Knights-villein provided military service directly to the king, and in exchange were entitled to the same set of privileges as minor nobles for doing so: among others, they did not pay scutage, and their testimony was considered proof in courts.