▁of ▁the ▁time . ▁His ▁father ▁was ▁D ư ơ ng ▁Kh ư ơ ng ▁while ▁the ▁stage ▁name ▁of ▁his ▁mother ▁was ▁V ư ơ ng ▁M <0xE1> <0xBA> <0xAB> u ▁( Que en ▁Mother ), ▁which ▁came ▁from ▁her ▁most ▁rec urrent ▁role . ▁While ▁pre gn ant , ▁she ▁was ▁made ▁a ▁cons ort ▁of ▁Prince ▁C ung ▁T ú c ▁Tr ầ n ▁D ụ c ▁who ▁was ▁the ▁son ▁of ▁Tr ầ n ▁Min h ▁T ô ng ▁and ▁elder ▁brother ▁of ▁the ▁reign ing ▁Emperor . ▁N h ậ t ▁L ễ ▁was ▁born ▁in ▁the ▁palace ▁and ▁was ▁adopted ▁by ▁Prince ▁C ung ▁T ú c ▁as ▁his ▁own ▁son . ▁ ▁Being ▁an ▁imp ot ent ▁man , ▁Emperor ▁D ụ ▁T ô ng ▁did ▁not ▁have ▁any ▁children , ▁so ▁appointed ▁his ▁brother ' s ▁son ▁N h ậ t ▁L ễ ▁as ▁his ▁successor . ▁This ▁decision ▁was ▁heavily ▁critic ized ▁by ▁contemporary ▁histor ians ▁because ▁it ▁broke ▁the ▁traditional ▁reg ulation ▁in ▁succession ▁and ▁brought ▁a ▁cha otic ▁period ▁to ▁the ▁Tr ầ n ▁D ynast y . ▁Tw enty ▁days ▁after ▁D ụ ▁T ô ng ' s ▁death ▁on ▁the ▁ 2 5 th ▁day ▁of ▁the ▁ 5 th ▁month ▁( L un ar ▁calendar ) ▁in ▁ 1 3 6 9 , ▁Queen ▁Mother ▁Hi ế n ▁T <0xE1> <0xBB> <0xAB> ▁u ph eld ▁the ▁Emperor ' s ▁will ▁by ▁inv iting ▁N h ậ t ▁L ễ