Some very useful information regarding possible plural nouns to refer to "the people who live in Alqualonde who are led by Olwë":
Teleri -- Pros: this is what they're called in the published Silmarillion. Cons: actually an exonym from the Vanyarin/Noldorin perspective, with vaguely derogatory connotations? Not something they called themselves. Also, the term is way too broad, technically including the Nandor and the Sindar as well.
Lindar -- Pros: this is what they called themselves, and it's a very pretty name. Cons: they aren't actually referred to this way in the Silmarillion, so no one will know what you're talking about. Could also technically refer to other members of the Nelyar.
Nelyar -- that's way too broad.
Falmari -- Pros: finally, a term specific to them and only them! It even appears once in the Silmarillion! Cons: Except for the text where "Falmari" and "Falathrim" both refer to Círdan's people.
Solosimpi -- Pros: unambiguously refers to them. Cons: ... only at their stage of development in The Book Of Lost Tales, and is thus mostly useless to any discussion.
Veaneldar -- Pros: "Sea-elves" is a very fitting and unambiguous term for them. Cons: doesn't fit into the same schema as the other sub-categories of the Quendi, also, will inspire reactions such as "what the fuck are you talking about?
Nendili -- Pros: pretty easily parse-able, with the link to water specifying which group of the Teleri this most likely refers to. Cons: what the FUCK are you talking about
Glinnil -- Pros: yay, a Sindarin term! Cons: same problem as "Teleri", with the additional problem that even in-universe only loremasters used this.
Lindai -- Pros: pretty sure this is the plural of "linda" within their own Telerin language, which is actually grammatically distinct from Quenya. Cons: you will have to explain this every time you use this word.
Foam-riders, ship-wrights, people of Olwë -- Pros: awesome names. Cons: no attested translation in Quenya, Sindarin, or Telerin.
(having said all this, I think I'll stick to Lindar or Falmari from their perspective, and Teleri from a Noldorin/Vanyarin perspective)