A title rather than a personal name. This individual should be moved to Fadros Pallujikaa (The Christmas Invasion).
Talk about it here.
In 2006 he led the tribe into Earth's airspace above London, specifically the Powell Estate. He brought Harriet Jones aboard when she declared herself leader of Earth, along with her aide, Alex Klein, Daniel Llewellyn and UNIT Major Blake. When Llewellyn attempted to plead mercy from the Sycorax, Pallujikaa murdered both him and Major Blake with his electro-whip. He saw through Rose Tyler's subterfuge when she claimed to have the authority to order the invaders to depart.
He duelled with the Tenth Doctor and cut off his hand which the Doctor was able to regrow using residual energy from his recent regeneration. This allowed the Doctor to defeat him. When the Doctor's back was turned, the leader tried to kill him again, but the Doctor used a satsuma from his borrowed dressing gown to hit a button which collapsed the ground the leader was standing on and he plummeted thousands of feet to his death. The Doctor justified his action by stating, "No second chances. I'm that sort of man." (TV: The Christmas Invasion)
The Great Intelligence mentioned, among others, the death of "the leader of the Sycorax" at the hands of the Doctor to dispute Madame Vastra's claim that the Doctor was never "blood-soaked". (TV: The Name of the Doctor)
Behind the scenes
- On-screen credit for the character lists him as "Sycorax Leader". However, he can be heard using his full name in Sycoraxic language to address himself during his first transmission to Earth.