Obi sits next to 4 phonetic neighbors — Obey, Kobi, and Tobi are the closest matches by sound. Most share Obi's African-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"child born at a prosperous time"
"shining glory"
"round, barrel"
"house guardian"
"peace settlement"
"divine water (Zoroastrian)"
"anointed one"
"rye land, land of rye fields"
"joy, song of joy"
"son of Dennis"
"little king, of royal descent"
"sword"
"the unseen"
"geographic name from ancient Gaulish"
"stammering"
"marshland meadow"
"night"
"Yahweh is righteous"
"son of the dark one (via Maurus)"
"brave warrior (via Wyatt)"
"acquired, possession"
Similar sound: These names share phonetic patterns with Obi — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Igbo origins, giving them the same cultural heritage as Obi.
Rhythm: Obi is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.