The name BOAC was derived from the tagalog word ?biak? which means divided. The river which ran from the eastern hinterland to the western plains down to the sea, had divided the town into two areas, the Northern Area and the Southern Area. The people used to say ?Ang Bayang Biak?. In the course of time, by means of verbal intercourse and communication and other exchange of letter and notes between the people of Marinduque and Mindanao, the tagalog word biak becomes ?Boac?, the name which has persisted up to the present.