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Ok, I think everyone's heard Jenga. So Jengo, meaning "building" is like Jenga where you have to build a tower with the pieces. I'm sure that's how the game was named.
Jango Fett (with an "a" instead of an "e", but it's pronounced the same way) was the bounty hunter who became the father/host/gene donor of all the clone troopers (later Imperial Stormtroopers) in Star Wars.