The names of Diku, Dwala and Naanda are copyright to Disney in the original Movie Sarabi was going to have a whole bunch of sisters I just made designs for them. But As for the names Cleff, Rovias, and Sipha I just came up with them from the top of my head. However a lot of the names of my characters are all Swahili in origin. I try naming my characters according to thier personalities, sometimes it doesn't always work. Its helpful to google Swahili names and just pick out what sounds best. I hope that helps somewhat.