Overlord was a title.

History and specifics

Yamato called himself the overlord of Rifas-L. (TOS comic: "The Perfect Dream")

The Redeemers were ruled by an overlord. (NF novel: Dark Allies)

Appendices

Appearances

• TOS comic: "The Perfect Dream"
• TOS novel: Deep Domain
• NF novel: Dark Allies
• ST - The Fall novel: Peaceable Kingdoms
• STO - Star Trek Magazine short story: "Locks Without Keys, Part 2"