New book title translation

Hello! Another question. The word Atanatari – and we have Atanatarion. How do you form this word from the plural "half-elves"? I mean peredhel + ion or peredhil + ion? Is it Peredhilion?

Atanatarion is the genitive plural of Atanatar - and both are in Quenya. Peredhel, meanwhile, is in Sindarin, so you cannot apply Quenya morphology to it. Do you want this in Quenya, or in Sindarin?

Hey! Thank you for your reply. Well, I think it should be in sindarin

Then I can offer O Pheredhil "About Half-elves".

Looks good. Thank you!