Looks like it should be pronounced Koo-Boo but is actually pronounced Kum-Boo. Surname, Figian in origin.
Kubu's are historically totally awesome people.
Kubu's have big hearts and like to make you giggle!
Kubu: Hi, my name's (insert name here) Kum-Boo.
Friend: No it's not it's Koo-Boo
Kubu: No, it's Kum-Boo, it has a silent 'M' in it.
Freind: Oohhh (feels sheepish)