Angeleno?

How do you call somebody from los angeles?

Angeleno.

http://www.wordiq.com/definition/List_of_adjectival_forms_of_place_names

How is this pronounced? "Angeleno" or "Angelenyo"?

It's spelled with an "n" not an "ñ", so it's pronounced:

English speakers - [@n dZe 'li: nOu]
Spanish speakers - [a:n he 'le no:] (this is a close representation of Spanish short vowel sounds)

Once in a while you'll see it spelled "Angelino", as in "Angelino Heights", an historical neighborhood of Victorian homes near downtown LA, so there's some confusion as to the correct spelling of our adjectival name.

Ooh..."AN historical"...that's quaint. Does anyone say that anymore?

Actually, I think the correct pronunciation is [@n dZ.. 'li: nOu], isn't it?

Hmmm...I believe you're right, Tom. dictionary.com has it with a schwa sound as well. My bad (ha! - is this expression still used?).

Random Chappie,
I always see "an historical" written in newspapers and magazines; never "a historical". When casually speaking, I probably would say "a historical" to avoid sounding affected, but when writing, I follow tradition.