Who designed the EC120 ?
As with most vehicles, the clue is in the name.
EC - Enrico Cincinpet
SA - Simone Antoine
MD - pre 1988 Michael Draycott; post 1988 Mark Dewhurst.
WHL - William Henry Longthorpe; name kept in respect, 'cause we British are like that, after his demise in 1977.
The more obvious ones;
Bell - Larry Bell
Mil - Mikhail Mil
Kaman - Karl Manheim
Robinson - Frank Robinson
Enstrom - Rudy Enstrom
Agusta - Giovanni Agusta
Schweizer - Paul, William (Bill), and Ernest Schweizer