The first settlers of San Roque were Ilokano migrants from the town of Paoay in Ilocos Norte and from Alcala and San Nicolas towns in Pangasinan. They travelled by foot and by horses and carabaos through San Nicolas, Pangasinan, passing through Imugan, Santa Fe, Nueva Vizcaya because that was the shortest way possible during those times. The migrants settled at Sitio Poonan (later called Puongan). The family of Apolonio Vadil was the first settler in Poungan. Old records from the Roman Catholic Church in Dupax del Sur showed that the daughter of Apolonio Vadil, Tomasa, was baptized on October 10, 1887.