Is there any reason you use Imbelaris (which probably has a stem Imbelarist- based on rista BTW) in the Heading and Arcimbelo in the text?
Also, I wouldn’t use Quendi in this context, Eldar seems sufficient, while using the former sounds a bit like saying “all the members of homo sapiens that participated in the Trojan war”: not technically wrong but not the usual word:
“But in fact [Quendi] has ceasesd in Aman to be a word of everyday use and remained thereafter mainly used in the special language of ‘Lore’ [...] In ordinary language the Elves of Aman called themselves Eldar” (WJ/372f.)