Complex sentence: The original usage of "Teleri" would eventually change until the name became "Vanyar", while the house of Elves called "Solosimpi" would inherit the name "Teleri".
Split into simpler sentences: The original usage of "Teleri" would eventually change until the name became "Vanyar". Meanwhile, the house of Elves called "Solosimpi" would inherit the name "Teleri".