▁contrast ▁to ▁the ▁t ên ▁n ô m , ▁or ▁vern ac ular ▁name , ▁written ▁in ▁locally ▁derived ▁S ino - V ietnam ese ▁characters ▁unique ▁to ▁trans cribe ▁non - S in ic ▁Vietnam ese ▁words . ▁In ▁the ▁Red ▁River ▁D elta , ▁the ▁dem otic ▁Vietnam ese ▁place ▁name ▁often ▁begins ▁with ▁" K <0xE1> <0xBA> <0xBB> " ▁for ▁example : ▁K <0xE1> <0xBA> <0xBB> ▁M <0xE1> <0xBA> <0xA9> y ▁( where as ▁the ▁t ên ▁ch ữ , ▁or ▁H án ▁Vi ệ t ▁name , ▁is ▁M ễ ▁Tr ì ), ▁K <0xE1> <0xBA> <0xBB> ▁C ót ▁( form ally ▁Y ên ▁Qu y ế t ), ▁K <0xE1> <0xBA> <0xBB> ▁V ọ ng ▁( D ị ch ▁V ọ ng ). ▁ ▁Many ▁if ▁not ▁most ▁city ▁names ▁in ▁Vietnam ▁are ▁S ino - V ietnam ese , ▁but ▁some ▁cities ▁also ▁have ▁earlier ▁N ô m ▁names : ▁▁ ▁H à ▁N ộ i ▁( H ano i ) ▁is ▁S ino - V ietnam ese ▁and ▁has ▁had ▁many ▁Chinese ▁names ▁- ▁Th ă ng ▁Long , ▁ Đ ô ng ▁Kin h ▁- ▁but ▁the ▁oldest ▁name ▁was ▁N ô m , ▁K <0xE1> <0xBA> <0xBB> ▁Ch ợ , ▁found ▁on ▁some ▁early ▁Portuguese - made ▁maps ▁as ▁" C ach ao ". ▁ ▁L ý ▁S ơ n ▁is ▁a ▁S ino - V ietnam ese ▁name , ▁but ▁concurrent ly ▁the ▁dem otic ▁name ▁C ù ▁La o ▁Ré ▁is ▁also