Alpha (The Evil of the Daleks)
From Tardis Wiki, the free Doctor Who reference
Alpha was a genetically altered Dalek, created by the Doctor. He isolated the Human Factor from Jamie McCrimmon and implanted it in three Daleks. If he hadn't done this the Daleks would have destroyed the TARDIS. (DW: The Evil of the Daleks)
In the DWM tale Children of the Revoloution it is shown that Alpha lead a group of survivors of the Dalek civil war to a distant planet where they survived and bred. However they were manipulated by Kata Phobus a telepathic parasite and destroyed themselves to prevent it from feeding off of them.
