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"
"fort, castle"
"small stream, narrow inlet"
"shining, radiant, brilliant"
"conviction, certainty"
"of God"
"shining, bright (via Hebrew Meir)"
"from the court"
"night"
"filled with divine grace"
"healer"
"healer, to heal"
"rye land, land of rye fields"
"modern invented name with energetic sound"
"peace (folk etymology)"
"the Lord is salvation"
"beam of light"
"noble, powerful"
"modern invented name"
"fighter, battle"
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.