Originally Posted by Jope
I'm afraid I can't help with the designer's name. Probably that's written in some Amiga history article on the net.. It could have been Jay Miner, but I only know for sure that Jay did the Agnus.
Judging from this interview
, I think you may be right. Seems that Jay Miner was perhaps responsible for all the major custom chips in the A1000. Interestingly, a couple of the custom chips had different names in the A1000 prototype. Paula was actually called Portia.