While I can't corroborate the story 98%, years ago I heard it from nominally believable sources within the company:
'Sony' was meant to evoke in English the idea of sonny. IIRC it evokes no Japanese association. There were some other candidates they kicked around, apparently with some real English speakers chiming in.. but clearly the sound, and a connotation of 'friendliness'- was no accident. Hey.. they Listened to Demming! (We never did)
I don't think any Japanese car name was ever chosen casually, though anyone's guess how they made the final cut.
(Now as to the AMC Matador and the Nova (no va = doesn't run, in Spanish). Obviously US carmakers in past, could care less what their names represented beyond our borders, whereas Japanese if anything - were/are obsessed?)
Ashton
who hasn't the foggiest either, what Camry or Celica might be trying to evoke.. but damn sure grok what Acura intended: and, it wasn't a lie. Fortunately. (Also their Legend, a name they discontinued about as wisely as HP went to *#@#$% pompously meaningless Agilent -- has indeed become its own connotation, as one of the best built cars ever: 250K+ miles is routine, now.
Ashton