From what I could tell, Raku appears to be from Rakudo, the Perl 6 compiler, which is a shortened form of rakuda-dou (="way of the camel" in Japanese). Rakudo also means "paradise". The "raku" from "way of the camel" means "camel", while the "raku" from "paradise" means "fun" or "enjoyable" (or "music"). Incidentally, it also happens to sound similar to "roku" (="six").
> Raku appears to be from Rakudo, the Perl 6 compiler, which is a shortened form of rakuda-dou (="way of the camel" in Japanese). Rakudo also means "paradise". The "raku" from "way of the camel" means "camel", while the "raku" from "paradise" means "fun" or "enjoyable" (or "music"). One of the worst problems for adoption of perl6 has been always overthinking. "Hey, look at my cool name" has never convinced anybody to…
You're overthinking it. I don't think those who came up with the names did so to, or cared to, convince people to use the language with them...