I mean, it's not actually. It's just a somewhat unusual transcription (well, originally somewhat unusual, now obviously it's the official English name) of what might be more usually transcribed as "Gojira".
Ah, I thought the Japanese word was just "jira". My mistake.
That's an entirely different monster.
Indeed, but not an entirely unrelated one though - per https://en.wikipedia.org/wiki/Jira_(software)#Naming the inspiration path was Bugzilla -> Godzilla -> Gojira -> Jira (which is why Confluence keeps correcting me when I try to spell it JIRA)