They
pronoun, の adjective
This is he but plural. The "ra" makes it plural, making it "they" or "them." While this gennnnnnerally refers to a group of males, it can include ladies too.
かれら
The reading is the same as the one you learned with the kanji.
彼らはみんな、カナダ人なんですよ。
They are all Canadians.
これから、彼らとホッケーをしに行くところなんです。
I am about to go play hockey with them.
彼らとは、メープルファームで出会いました。
I met them at a maple farm.
彼らは仲の良い友達です。
They are good friends.