Krotus was an Andorian historical figure, a noted despot who harbored goals of great conquest, but ultimately failed in his desires.
History would remember him as the Ka'Thelan Conqueror of Andoria, who swept across the planet, forcing the Andorians into a new cultural and technological era. His entire world bowed to him, but his empire ultimately crumbled and he was murdered by his own daughter. (Last Unicorn RPG module: The Andorians: Among the Clans; ENT novel: Beneath the Raptor's Wing)
In the 22nd century, Krotus had an Andorian starship, the IGS Ka'Thelan Krotus, named in his honor, which also led to naming of a 24th century, Federation Ambassador-class starship, the USS Krotus, also in his honor. (Decipher RPG module: Starships)