Definition of "Oh"

Oh¹

/oʊ/

proper noun
1. A surname from Korean derived from a common Korean surname.
  Quotations
  “Your son’s name. What is it?”“Oh. Benjamin Oh.”“Benjamin O … what?”“No, Oh, Officer. That’s it. The last name is Oh.”
  2021, Ruth Ozeki, The Book of Form and Emptiness, Canongate Books (2022), page 294

Oh²

/oʊ/

proper noun
1. A surname from Chinese.