were Ignossi and twala brother each other?

As the group of travelers approaches the land of the Kukuana, they are met by a group of locals led by Infadoos, son of Kafa, and Scragga, son of the reigning King of the Kukuanas, Twala.
Infadoos’s father, Kafa was a King. When he died, the kingship was passed on to Imotu, who was Infadoos’s half-brother. However, Imotu had a twin brother who was secretly kept alive by their mother, in spite of their traditions—according to the customs of the Kukuana people, the weaker one of the twins must die. The weaker twin was called Twala.
According to Infadoos, when Imotu was King, there came a famine upon the people. At this time, Imotu already had a three-year-old son by his favorite wife. The boy was called Ignosi. The people complained because of the ravaging famine. Gagool, the wise and terrible woman, took advantage of the situation to introduce Twala as the people’s new King. Upon being proclaimed as King, Twala murdered his twin brother Imotu and took over the kingship. Imotu’s wife and son, Ignosi, ran away never to be seen again.
Therefore, Infadoos, Imotu, and Twala are all brothers. Twala would be Ignosi’s uncle.