Valmiki Ramayana Bala Kanda Sarga 17 Shloka 29

ते हरियूथपा: those commanders of monkey forces, हरीणाम् monkeys, प्रधानेषु among important ones, यूथेषु monkey forces, यूथपश्रेष्ठा: बभूवु: important monkeys were born, वीरान् herioc, हरीन् monkeys, अजनयन् created.

Those monkey commanders created heroic monkeys among the chief monkey clans who later proved the best among clanleaders.