Oh sits next to 5 phonetic neighbors — Bo, Mo, and Jo are the closest matches by sound. Most share Oh's Chinese/Korean (吳)-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from the state of Wu (ancient Chinese kingdom)"
"from Florence, blooming"
"the solar deity"
"God"
"character, virtuous disposition"
"one of the Vandal people"
"thatcher, roofer"
"son of Jack, God is gracious"
"western land, western meadow"
"exalted, noble, high"
"from Laurentum; crowned with laurel"
"defender of men; little saint"
"Har (God/Hari) + Fateh (victory)"
"warrior, army man"
"hammer, mallet"
"nickname name (Thai given name)"
"river crossing dweller"
"garden enclosure"
Similar sound: These names share phonetic patterns with Oh — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Chinese/Korean (吳) origins, giving them the same cultural heritage as Oh.
Rhythm: Oh is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.