Amazones
Francisco de Orellana was a Spanish conquerer who crossed the Amazone River from the beginning till the end in 1542. During the journey he and his men saw armed female warriors. They were very advanced in their battles.
This reminded Fransisco de Orellana of the Greek myth about the Amazones which Homerus mentioned in his writings in the early 4th century before Christ. The name of the river is also distract from the female warriors.