▁from ▁" man " ▁meaning ▁" first ," ▁and ▁" day a " ▁meaning ▁" up stream " ▁or ▁" upper ▁portion ▁of ▁a ▁river ," ▁and ▁therefore ▁means ▁" the ▁first ▁people ▁up stream ". ▁It ▁refers ▁to ▁a ▁number ▁of ▁groups ▁found ▁along ▁the ▁mountain ▁ranges ▁of ▁D ava o ▁Oriental , ▁as ▁well ▁as ▁to ▁their ▁custom s , ▁language , ▁and ▁belief s . ▁The ▁Mand aya ▁are ▁also ▁found ▁in ▁Com post ela ▁and ▁New ▁B ata an ▁in ▁Com post ela ▁Valley ▁( former ly ▁a ▁part ▁of ▁D ava o ▁del ▁Norte ▁Province ). ▁ ▁Man ob o ▁ ▁Man ob o ▁is ▁the ▁his pan ic ized ▁sp elling ▁of ▁the ▁end onym ▁Man uv u ▁( also ▁sp elled ▁Men uv u ▁or ▁Min uv u ). ▁Its ▁et ym ology ▁is ▁unclear ; ▁in ▁its ▁current ▁form ▁it ▁means ▁' person ' ▁or ▁' people '. ▁It ▁is ▁believed ▁that ▁it ▁is ▁derived ▁from ▁the ▁root word ▁t uv u ▁which ▁means ▁" to ▁grow " /" g row th " ▁( th us ▁Man [ t ] uv u ▁would ▁be ▁"[ native ] - g rown " ▁or ▁" abor iginal "). ▁ ▁The ▁Man ob o ▁are ▁probably ▁the ▁most ▁diverse ▁eth nic ▁groups ▁of ▁the ▁Philippines ▁in ▁the ▁relationships ▁and ▁names ▁of ▁the ▁groups ▁that ▁belong ▁to ▁this ▁family ▁of ▁languages . ▁The ▁total ▁current ▁Man ob o ▁population ▁is ▁not ▁known , ▁although ▁they ▁occup y ▁core ▁areas