I want to use the name Eryndrim for my kinship, but I want to make sure it means what I think it means.

Apparently both the word "eryn" and the word "tawar" mean "forest", but is there some slight difference in the meanings? And am I right in adding -drim instead of -rim because "eryn" ends on an N (I did this because it's like that in the word "Gondolindrim", meaning "people of Gondolin)? I want it to mean "people of the forest" or "forest people". Would it be more accurate to use "Tawarrim"? I hope I'm making sense—I know very little Sindarin.