High Quality Content by WIKIPEDIA articles! Rudolf Duala Manga Bell (1873–8 August 1914) was a Duala king and resistance leader in the German colony of Kamerun. After being educated in both Kamerun and Europe, he succeeded his father, Manga Ndumbe Bell, on 2 September 1908. Manga Bell styled himself after European rulers, and he generally supported the colonial German authorities. He was quite wealthy and educated, although his father left him a substantial debt.