https://en.wikipedia.org/wiki/The_Katzenjammer_Kids wrote:
<<The Katzenjammer Kids featured Hans and Fritz, [Gemini] twins who rebelled against authority, particularly in the form of their mother, Mama; der Captain, a shipwrecked sailor who acted as a surrogate father; and der Inspector, an official from the school system. Other characters included John Silver, a pirate sea captain and his crew, and King Bongo, a primitive-living but sophisticated-acting jungle monarch who ruled a tropical island. Several of the characters spoke in stereotypical German-accented English.
The defining theme of the strip was Hans and Fritz pranking der Captain, der Inspector, Mama, or all three, for which the boys were often spanked, but sometimes shifted the blame to others. Other stories involved der Captain taking the Katzenjammers on treasure hunts or cargo voyages, sometimes aided by or competing with John Silver. Still other stories involved King Bongo enlisting the Katzenjammers to run errands or go on missions related to his kingdom; in both strips, by the mid-1930s, the family lived on Bongo's island—usually called Squee-Jee—and were readily at hand.
Knerr's version of The Katzenjammer Kids introduced several major new characters in the 1930s.
Miss Twiddle, a pompous tutor, and her brainy niece Lena came to stay permanently with the Katzenjammers in early 1936. Later in the year Twiddle's ex-pupil,
"boy prodigy" Rollo Rhubarb joined them. The EVER-smug Rollo is always trying to outwit Hans and Fritz, but his cunning plans often backfire.>>