Did You Know?
His mother, Ida Elisabeth Hammerich, was the official translator of the Danish version of the newspaper/magazine cartoon "Peanuts". One of the characters, the little dirty and dusty boy "Pigpen", was called "Rumle" in the Danish version. As her own son, Jens Peter, as a kid seemed to copy the habits of getting dirty and dusty, she nicknamed him Rumle. And the name, not the dust, stuck.