Lumo

From Memory Alpha, the free Star Trek reference

Lumo was a warrior of American Indian descent that lived on the planet Amerind.

One of the tribes young boys who was attending the fishnets, when he became entangled in them and sank to the bottom of the river. Lumo brought him up quickly, but the condition of the boy was declared dead by Salish, the medicine man. Kirok, however, would be able to save the boy by using mouth-to-mouth resuscitation, and effectively breathed new life into the dead. (TOS: "The Paradise Syndrome")

Lumo was credited as "Warrior" and was played by actor Peter Virgo, Jr.. The Indian boy he rescued was played by actor Lamont Laird.