Magnus (89067986779811167562948736197891674912223184th Universe)
From Jenny Everywhere Wiki
In the 89067986779811167562948736197891674912223184th Universe, when confronted with Jenny Nowhere as he was about to steal a TARDIS and leave Gallifrey, the First Doctor briefly entertained the possibility that she was his old friend Magnus in a new body. However, she swiftly denied it, explaining that she wasn't Gallifreyan at all. (PROSE: How To Steal Timeships & To Influence Time Lords)
Behind the scenes
“Magnus” was a name introduced in the Doctor Who comic story Flashback (and used on a few subsequent occasions) as an old nickname of the Time Lord later known as the Master.
