The only Ernie from Youngstown that I know personally who was connected to the Pittsburgh rackets was Ernest "Ernie B" Biondillo, who was shotgunned to death on orders from Youngstown crime boss Lenny Strollo on June 3rd, 1996. Ernie would have been 23 years old at the time of the Mannarino wedding. Very Interesting Maggie, thanks for sharing.
Ernie B was the only "Ernie" from Youngstown I ever knew. As far as "Jackie" goes: Your guess is as good as mine. The only Jackie I knew was from Niles/Warren, a pretty big "BM".