Alonis Cobaryn was a Rigelian man of the 22nd century.

He was one of the first captains to serve in the Federation Starfleet. Amongst the earliest captains, there was a divide between those considered "Butterfly Catchers" (scientists) and Romulan War veterans over what the future of the new Starfleet should be. Cobaryn was on the Butterfly Catcher's side.

He was first captain of an old Christopher-class ship, and later of the Daedalus-class USS Horizon (ST novel: Starfleet: Year One).

He is presumed to have still been in command when the ship made contact with the inhabitants of Sigma Iotia II. He left behind a book, which had been a gift to him: Chicago Mobs of the Twenties. This action contaminated the culture of the Sigma Iotians, who modeled their society after the Chicago mobs (TOS episode: "A Piece of the Action").

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