Filemon Lagman, Filipino activist (died 2001)

Filemon Castelar Lagman, popularly known as Ka Popoy, was a revolutionary socialist and workers' leader in the Philippines who supported Marxism-Leninism. He split with the Communist Party of the Philippines in 1991 due to ideological disagreements to form the Bukluran ng Manggagawang Pilipino (BMP). He was assassinated in 2001.