Cyber-Lord

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

Characteristics
The Cyber-Lord was distinguished by its Cyber-helmet which had black side handles, like a Cyber-Leader. It was further distinguished by a black face plate and a transparent "window" through which the brain could be seen, similar to the Cyber-Controller of the Cybus Cybermen. (TV: The Next Doctor)

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. The chest plates of this Cyberman and its subordinates bore the image of the faceplate rather than the logo of Cybus Industries. (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)