▁events ▁in ▁Vietnam ese ▁history ▁have ▁contributed ▁to ▁the ▁name ’ s ▁prom in ence . ▁In ▁ 1 2 3 2 , ▁after ▁us ur ping ▁the ▁L ý ▁D ynast y , ▁Tr ầ n ▁Th ủ ▁ Đ ộ ▁forced ▁the ▁descend ants ▁of ▁the ▁L ý ▁to ▁change ▁their ▁surname ▁to ▁N gu y ễ n . ▁When ▁H ồ ▁Qu ý ▁Ly ▁over turn ed ▁the ▁Tr ầ n ▁D ynast y , ▁he ▁killed ▁many ▁of ▁their ▁descend ants ▁so ▁when ▁the ▁H ồ ▁D ynast y ▁col lapsed ▁in ▁ 1 4 0 7 , ▁many ▁of ▁his ▁descend ants ▁changed ▁their ▁surname ▁to ▁N gu y ễ n ▁in ▁fear ▁of ▁ret ribution . ▁In ▁ 1 5 9 2 , ▁on ▁the ▁collapse ▁of ▁the ▁M ạ c ▁D ynast y , ▁their ▁descend ants ▁changed ▁their ▁surname ▁to ▁N gu y ễ n . ▁When ▁the ▁N gu y ễ n ▁D ynast y ▁( the ▁descend ants ▁of ▁the ▁N gu y ễ n ▁L ords ) ▁took ▁power ▁in ▁ 1 8 0 2 , ▁some ▁of ▁the ▁descend ants ▁of ▁the ▁Tr ị n h ▁L ords ▁fear ing ▁ret ribution ▁changed ▁their ▁surname ▁to ▁N gu y ễ n , ▁while ▁others ▁fled ▁north ▁into ▁China . ▁ ▁The ▁N gu y ễ n ▁D ynast y ▁awarded ▁many ▁people ▁the ▁surname ▁N gu y ễ n ▁during ▁their ▁rule , ▁and ▁many ▁crim inals ▁also ▁changed ▁their ▁surname