Lumang's youngest son, Imbing, took over the leadership of the Subanens during the American regime. It was during this time that his victorious battle of Mount Guillian took place against the Iranons. Mount Imbing was named by American Governor-General Leonard Wood, who happened to stay with Timuay Beng Imbing on his way to Lakewood, where he saw a lake while flying during World War I. The lake was so beautiful surrounded by trees that General Wood named it Lakewood. Today, Lakewood is already a municipality which was a former barangay of Lapuyan, Zamboanga del Sur.