, ▁were ▁incl ined ▁to ▁possess ▁each ▁other ▁in ▁common ". ▁Friedrich ▁R atz el ▁in ▁The ▁History ▁of ▁M ank ind ▁reported ▁in ▁ 1 8 9 6 ▁that ▁in ▁Hawai i ▁a ▁kind ▁of ▁in cip ient ▁poly and ry ▁arose ▁by ▁the ▁addition ▁to ▁the ▁marriage ▁establishment ▁of ▁a ▁cic is be o , ▁known ▁as ▁P unal ua . ▁In ▁some ▁parts ▁of ▁Mel anes ia , ▁there ▁are ▁" sex ual ▁relations ▁between ▁a ▁group ▁of ▁men ▁formed ▁by ▁the ▁husband ' s ▁brothers ▁and ▁a ▁group ▁of ▁women ▁formed ▁by ▁the ▁wife ' s ▁sister s ". ▁Women ▁of ▁N air ▁community , ▁a ▁cas te ▁in ▁Ker ala , ▁India , ▁used ▁to ▁practice ▁poly and ry . ▁Tod a ▁people , ▁who ▁live ▁on ▁the ▁isolated ▁Nil gi ri ▁plate au ▁of ▁Southern ▁India ▁pract iced ▁ad el ph ic ▁poly and ry ▁for ▁centuries , ▁but ▁no ▁longer ▁do ▁so . ▁Adel ph ic ▁poly and ry ▁occurs ▁when ▁brothers ▁share ▁the ▁same ▁wife ▁or ▁w ives . ▁Such ▁arrang ements ▁have ▁been ▁common ▁in ▁H imal ay an ▁tribes ▁until ▁recently . ▁ ▁In ▁Sri ▁L anka , ▁Sin hal ese ▁people ▁pract iced ▁ad el ph ic ▁poly and ry ▁in ▁the ▁past , ▁but ▁no ▁longer ▁it ▁is ▁common ▁to ▁do ▁so . ▁The ▁main ▁mot ive ▁behind ▁this ▁is ▁to ▁protect ▁the ▁wealth ▁und iv ided . ▁If ▁there ▁were ▁seven ▁or ▁less ▁brothers ▁in ▁a ▁family , ▁younger ▁brothers