angs ▁in ▁China ▁and ▁Taiwan ▁was ▁estimated ▁at ▁more ▁than ▁ 3 0 ▁million ▁in ▁ 2 0 0 7 ; ▁it ▁was ▁also ▁the ▁surname ▁of ▁more ▁than ▁ 2 ▁million ▁over se as ▁Chinese , ▁ 4 . 6 ▁million ▁Vietnam ese ▁( 5 . 1 % ), ▁and ▁an ▁estimated ▁ 1 ▁million ▁Kore ans ▁( The ▁ 2 0 0 0 ▁census ▁of ▁South ▁Korea ▁revealed ▁it ▁was ▁the ▁surname ▁for ▁ 6 4 4 , 2 9 4 ▁South ▁Kore ans , ▁ranked ▁ 1 7 th ). ▁ ▁Hu ang ▁is ▁also ▁the ▁p iny in ▁roman ization ▁of ▁the ▁very ▁rare ▁surname ▁ 皇 . ▁ ▁Pr on unci ations / trans liter ations ▁ ▁Hu ang ▁ 黃 , 皇 ▁used ▁in ▁Mand arin ▁H w ang ▁ 황 , 黃 , 皇 ▁used ▁in ▁Korean ▁ ▁Hu ỳ n h ▁or ▁Ho à ng , ▁used ▁in ▁Vietnam ese . ▁Hu ỳ n h ▁is ▁the ▁cogn ate ▁adopted ▁in ▁Southern ▁and ▁most ▁parts ▁of ▁Central ▁Vietnam ▁because ▁of ▁a ▁naming ▁tab oo ▁dec ree ▁which ▁b anned ▁the ▁surname ▁Ho à ng , ▁due ▁to ▁similarity ▁between ▁the ▁surname ▁and ▁the ▁name ▁of ▁Lord ▁N gu y ễ n ▁Ho à ng . ▁ ▁V ong , ▁ang lic ized ▁from ▁H ak ka , ▁used ▁in ▁Vietnam ese ▁ ▁Ng , ▁Ung , ▁O ng , ▁We e , ▁O i , ▁O oi ▁or ▁U y , ▁used ▁in ▁Minn an