▁tribes . ▁Non eth eless , ▁individual ▁Q ays i ▁tribes ▁remained ▁a ▁pot ent ▁force ▁and ▁some ▁migr ated ▁to ▁North ▁Africa ▁and ▁I ber ia ▁where ▁they ▁car ved ▁out ▁their ▁own ▁power . ▁ ▁Name ▁and ▁gene al ogy ▁The ▁full ▁name ▁of ▁the ▁trib al ▁conf eder ation ▁is ▁Q ays ▁ ʿ A yl ā n ▁or ▁Q ays ▁ibn ▁ ʿ A yl ā n , ▁though ▁it ▁is ▁most ▁frequently ▁referred ▁to ▁simply ▁as ▁Q ays ; ▁occasionally ▁in ▁Arab ic ▁poetry , ▁it ▁is ▁referred ▁to ▁sole ly ▁as ▁ ʿ A yl ā n . ▁M embers ▁of ▁the ▁Q ays ▁are ▁referred ▁to ▁as ▁al - Q ays ĭ y ū n ▁( sing . ▁Q ays ī ), ▁transl iter ated ▁in ▁English - language ▁sources ▁as ▁" Q ays ites " ▁or ▁" K ais ites ". ▁As ▁an ▁eth no - polit ical ▁group , ▁the ▁Q ays ▁are ▁referred ▁to ▁in ▁contemporary ▁sources ▁as ▁al - Q ays ī y ya . ▁Un like ▁most ▁Arab ▁tribes , ▁the ▁sources ▁s eld om ▁use ▁the ▁term ▁Ban ū ▁( s ons ▁of ) ▁when ▁referring ▁to ▁the ▁descend ants ▁of ▁Q ays . ▁ ▁Q ays ▁is ▁the ▁names ake ▁and ▁pro gen itor ▁of ▁the ▁conf eder ation , ▁and ▁traditional ▁Arab ▁gene al ogy ▁holds ▁that ▁the ▁father ▁of ▁Q ays ▁was ▁a ▁certain ▁ ʿ A yl an . ▁According ▁to ▁the ▁gene alog ists ,