His mother was Nabulya Naluggwa of the Ndiga clan, the second of his father's wives.
He ascended to the throne upon the death of his elder brother, Kabaka Mwanga I Sebanakitta, in 1741.
His stubborn refusal to heed his brother Prince Kyabaggu's request to execute Dibbongo ignited a conflict between the two that eventually led to his abdication.
[4] He is recorded to have married six (6) wives:[1] He is recorded to have fathered three sons: His genial nature made him a more acceptable candidate to men who still remembered the tyranny of Kagulu’s rule.
Kabaka Namuggala abdicated in favor of his younger brother, Kyabaggu Kabinuli, around 1750.