Altair (a Aquilae, a Aql) is the brightest star in the constellation Aquila and the twelfth brightest star in the night sky. It is currently in the G-cloud. Altair is an A-type main sequence star with an apparent visual magnitude of 0.77 and is one of the vertices of the Summer Triangle (the other two vertices are marked by Deneb and Vega). It is 16.7 light-years (5.13 parsecs) from Earth and is one of the closest stars visible to the naked eye.

Altaïr Ibn-La'Ahad (, meaning "The Bird Son of No One") is a fictional character in the Assassin's Creed series. He serves as the protagonist of Assassin's Creed, Assassin's Creed: Altaïr's Chronicles and Assassin's Creed: Bloodlines. Altaïr also shares the role as protagonist in Assassin's Creed: Revelations with Ezio Auditore da Firenze and is playable once in Assassin's Creed II. Although he had received some criticism for his voice-over performance and (initial) lack of backstory, he was nonetheless well received by critics and gamers alike.