I think a better way forward would be to do something fun with the 'Autopilot' name, e.g.:
"Zanzibar (formerly known as Autopilot)"
Nobody need know what "Zanzibar" actually is other than some place a long way from California. You could easily talk about your Tesla to a non-owner saying 'yeah, it's got Zanzibar...' or to a fellow owner 'did you spec the Zanzibar level 5 option?'
I picked the name 'Zanzibar' randomly here, it could be any place rather than any thing. If Autopilot was rebranded as 'celery' then someone would expect that in the glovebox. A brand name that means nothing and can be nebulous would be best.