Any idea who the six companions of Rhaegar were when he abducted Lyanna?

If I had to guess…the three Kingsguard who were at the Tower of Joy, plus Richard Lonmouth and Myles Mooton. While Jon Connington is a logical choice for the sixth, I would have thought given his feelings we would have read about his resentments towards Lyanna. So given the location and the fact that Brandon heard about it PDQ, I’m going to guess that Walter Whent was the sixth man at the Godseye. 

EDIT:

So according to the App, Ser Gerold was sent to find Rhaegar after the Rebellion went sideways, so wouldn’t have been there then. So we’re still looking at Arthur Dayne, Oswell Went, Walter Whent, Myles Mooton, Richard Lonmouth, and one other.