cau·dil·lo 
(kô-dēlyō, -dēyō, kou-)
(kô-dēlyō, -dēyō, kou-)n. pl. cau·dil·los
1. A leader or chief, especially a military dictator.
2. A political boss; an overlord.
[Spanish, leader, from Late Latin capitellum, diminutive of Latin caput, head; see kaput- in the Appendix of Indo-European roots.]