Kroonenberg has been active in Scouting since 1935 and attended the 5th World Scout Jamboree in Vogelenzang, Bloemendaal, the Netherlands, in 1937.
Piet Mondrian | Piet Hein | Piet Pieterszoon Hein | Zwarte Piet | Piet Hein (Denmark) | Tony Piet | Piet Zwart Institute | Piet van Heerden | Piet Uys | Piet Oudolf | Piet Kramer | Piet Joubert | Piet Cronjé | Piet Cronje |