Terrapin
The name "terrapin" is derived from torope, a word in the Native American Algonquian language that refers to the species, Malaclemys terrapin. It appears that it became part of common usage during the colonial era of North America and was carried back to Great Britain. Since then, it has been used in common names for turtles in the English language. In the UK, red-eared sliders are known as red-eared terrapins.