Leon Ortegas
Exchanging tips about the earily LucasFilm Adventure Games™ are also among the last good memories I have from my dad (we didn't play at the same time to avoid spoiling puzzles).

BTW, if it is ever made, no need for 3a, there never was a MI3, nominally. The third game of the series is called CoMI, and IIRC the executable wasn't even named "monkey3.exe"... So "Monkey Island 3" is available :-).