Oh
A Korean surname most famously written Oh in English, usually representing the Korean family name 오.
The #1,978 most common surname in the United States (2010 Census) — about 1 in every 16,885 Americans shares it.
Etymology
Oh is the common English spelling of the Korean surname 오, which is usually romanized as O or Oh. In Korean, the name is written with a single syllable and is traditionally associated with Chinese character lineages read as O in Korean. The surname does not come from the English interjection "oh"; it is a transliteration of a Korean family name.
History
The surname is well established in Korea and among Korean diaspora communities, where English-language records often spell it Oh. Different romanization systems have produced both O and Oh in passports, immigration records, and English-language publications. In the United States, it is primarily encountered as a Korean-American surname.
Origin
Regions
Variant spellings
Fun fact
Because it is a one-syllable Korean surname, Oh can be a romanization choice rather than a different family name, so the same Korean surname may appear as O in some records and Oh in others.