Amerind

From Memory Alpha, the free Star Trek reference.

Amerind was a planet located half a galaxy away from Earth, yet possessed growth exactly like that of Earth. Amerind was populated by a group of Native Americans.

Centuries earlier, several threatened tribes, including a mixture of Navajo, Mohican, and Delaware Indians, were transplanted from Earth to Amerind by a group known to them as the Wise Ones. These Wise Ones also placed an obelisk on the planet, which possessed an asteroid deflector, used to protect the planet's inhabitants. By the mid-23rd century the obelisk had malfunctioned and the planet was vulnerable to asteroid collisions.

In 2268, the USS Enterprise was on a mission to divert an asteroid, nearly the size of Luna, off of the collision course it was on with Amerind. Although the Enterprise was unable to stop it, they were able to repair the deflector in the obelisk, which was in turn able to deflect the asteroid, and once again protect the planet. (TOS: "The Paradise Syndrome")

The name Amerind appeared in the episode's script and was not mentioned on screen. It's name may have been taken from "Amerindian," a name for Native Americans.

For the 2007 remastered edition of "The Paradise Syndrome", the planet Amerind received a new look, replacing the original version with a computer-generated planetscape.