Cyber-Lord

Cyber-Lord was a title used by high-ranking Cybermen.

History
A Cyber-Lord led the surviving Cybus Cybermen in London in 1851. (TV: The Next Doctor)

A Cyber-Lord was confronted by the Eleventh Doctor in the 21st century below the Arctic Circle. (GAME: Blood of the Cybermen)

A Cyber-Leader that was visibly distinguished like a Cyber-Lord led the Twelfth Cyber Legion. (TV: A Good Man Goes to War)

A Cyber-Leader that was visibly distinguished like a Cyber-Lord led the weapons-grade Cybermen at the end of the universe and was itself subordinate to the Cyber-Controller. (COMIC: Supremacy of the Cybermen)

Other references
The Cyberlords were a later stage of Cyberman who formed the Cyberlord Hegemony (PROSE: The Quantum Archangel, PROSE: The Crystal Bucephalus)