▁On ▁the ▁other ▁hand , ▁parallel ▁cousin ▁un ions ▁in ▁some ▁cult ures ▁would ▁fall ▁under ▁an ▁inc est ▁tab oo , ▁since ▁parallel ▁c ous ins ▁are ▁part ▁of ▁the ▁subject ' s ▁un il ine age ▁whereas ▁cross - c ous ins ▁are ▁not . ▁ ▁Kin ship ▁termin ologies ▁▁ ▁In ▁many ▁" class ific atory " ▁systems ▁of ▁kin ship ▁termin ology , ▁relatives ▁far ▁beyond ▁gene alog ical ▁first ▁c ous ins ▁are ▁referred ▁to ▁using ▁the ▁terms ▁for ▁parallel ▁and ▁cross - c ous ins . ▁And ▁in ▁many ▁soci eties , ▁parallel ▁c ous ins ▁( but ▁not ▁cross - c ous ins ) ▁are ▁also ▁referred ▁to ▁by ▁the ▁same ▁terms ▁that ▁are ▁used ▁for ▁sib lings . ▁For ▁instance , ▁it ▁is ▁characteristic ▁of ▁the ▁" I ro qu ois " ▁system ▁of ▁kin ship ▁termin ology , ▁its ▁variants ▁the ▁" C row " ▁and ▁" O ma ha ", ▁and ▁most ▁Australian ▁Ab original ▁systems , ▁that ▁a ▁male ▁parallel ▁cousin ▁is ▁referred ▁to ▁as ▁" bro ther ", ▁and ▁a ▁female ▁parallel ▁cousin ▁is ▁" s ister ". ▁In ▁an ▁I ro qu ois ▁type ▁of ▁termin ology , ▁if ▁the ▁terms ▁used ▁to ▁refer ▁to ▁cross - c ous ins ▁are ▁assim il ated ▁to ▁those ▁for ▁other ▁relatives , ▁it ▁is ▁generally ▁in - la ws ▁( since ▁marriage ▁with ▁cross - c ous ins ▁is ▁often ▁prefer entially ▁fav ored ), ▁so ▁that ▁the ▁terms ▁for ▁" male