Career
He began creating comics as a child. Later he worked for the Dutch comics pioneer Marten Toonder. lieutenant first appeared in the woman"s magazine Libelle on December 12, 1970.
In German-speaking Switzerland it appeared in the magazine Spick which targeted children and teenagers.
And in Germany Favorit published it for some time under the name "Ulli, Ulla und die Kinder". Two years later he retired.
Daughter Andrea Kruis has followed in her father"s footsteps. In 2013 his career was celebrated in a one-off glossy-zine.
This includes previously unpublished gags of a comic about an infant punk raised by a gay couple.
Hence the nickname "January, January en de Kinderen" ("Jack, Jack and the Juniors").