I can't be the only person wondering: how do you pronounce it? Kay-you/Say-you? Kyuh/Syuh?
I think it is a take on Lua (the scripting language) which means moon.
The pronunciation is like 'Seoul' (South Korean Capital), with the 'e' pronuonced slightly more open as in egg.
I'm confused because Seoul doesn't have an 'e' sound in it at all, in Korean.
ps: forgot about https://translate.google.com/#en/ko/seoul, according to them it's not entirely silent.
It's nothing like any of the sounds an "e" can represent in English.
Europeans tend to pronounce it "See-OOL" which is just completely wrong.
The vowel ʌ is described as "between pearl and pull, with spread lips"