Slaar

Slaar was the leader of a group of Ice Warriors that took over the Moonbase in the 21st century. He planned to use T-Mat to send seed pods all over Earth which would deplete oxygen, killing the Humans and allowing the Martians to colonize the planet. He was defeated by the Second Doctor and was accidentally killed by one of his warriors' sonic blasts. (DW: The Seeds of Death)

The son of Slaar was Draan who was left orphaned after his fathers death but was adopted into the next of Grand Marshal Falaxyr and he later served the Ice Lord as his adjutant. (NA: GodEngine)