How do you say “courtesy name” in Vietnamese?

Vietnamese words for “courtesy name”

• tựListennoun
  Hanoi [tɨ˧˨ʔ] · Saigon [tɨ˨˩˨]tự heavy

  oneself; by oneself; from

  for “courtesy name” meaning: An alias used instead of one's given name by peers and subordinates as a symbol of adulthood and respect in China and sometimes more broadly other East Asian cultures.

• biệt hiệuListennoun
  Hanoi [ʔɓiət̚˧˨ʔ hiəw˧˨ʔ] · Saigon [ʔɓiək̚˨˩˨ hiw˨˩˨]biệt heavy hiệu heavy

  nickname; alias

  for “courtesy name” meaning: An alias used instead of one's given name by peers and subordinates as a symbol of adulthood and respect in China and sometimes more broadly other East Asian cultures.

• chữListennoun
  Hanoi [t͡ɕɨ˦ˀ˥] · Saigon [cɨ˨˩˦]chữ creaky rising

  a letter or character; a writing system; a script

  for “courtesy name” meaning: An alias used instead of one's given name by peers and subordinates as a symbol of adulthood and respect in China and sometimes more broadly other East Asian cultures.