Gern

From Tardis Wiki, the free Doctor Who reference

Gern was a Cyberman from the planet Mondas and one of the four Cyber-Leaders who led the of invasion International Space Command HQ in Geneva.

Gern and all the other Cybermen around the world were eliminated when their home planet and power source, Mondas, disintegrated. (TV: The Tenth Planet/PROSE: Doctor Who and the Tenth Planet)