Both Sirius and Remus have ran away. Remus when he was 7 after hearing a loud conversation about his 'furry little problem' between his parents. His parents found him after an hour of him running away. Sirius ran away at the age of 16.
Harry Potter One Shots and He...
By accio_brain
Marauder, Harry Potter Next Generation, Golden Trio Era's Headcanons More