“I’d also agree that Frank, Whitey and Teddy share lots of traits”
Amen! There were/are filthy scumbags.
One thing always sticks out about ‘The Departed’: An Irishman named Frank Costello? Doesn’t sound too Irish to me. There was a real Frank Costello that was a member of the the Luciano/Genovese crime family.
That's because the original 12th-century Gaelic name was MacOisdealbhaigh. Gaelic was usually Anglicized when the Irish migrated to Britain, the U.S. or Canada. The "Costello" spelling could have originated in Italian, but it was applied to Irish named MacOisdealbhaigh.