Monkey d. Luffy as reported by Wikia. Luffy monkey, known "straw fluently" main protagonist of the straw, founder of more and more infamous straw pirates, four fighters.
Monkey d. Garp in line with Wikia. Vice admiral monkey garp. Dragon monkey, grandfather monkey adopting grandfather ace.
Monkey of spirit pursuant to Wikipedia. This article allows most readers to improve nonexperts without technical details.