Eight is a male Canadian lynx that has been released by humans into the German forest land close to Francis's city being part of a reintroduction program. He appears in the second novel of Felidae (Felidae-2 or Francis on the Road).

His true name is actually unknown (it's neither known if he had one before his capture) and when he's introducing himself to Francis, for a short time he wonders if the name given to him by humans was "Eight" or "Ten", a clear reference of the identification number assigned by humans.