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"
"conviction, certainty"
"son of the right hand"
"hay valley"
"fighter, battle"
"son of Morris/Maurice"
"divine water (Zoroastrian)"
"fire brand, flaming sword"
"son of Day, child of daylight"
"elf ruler"
"house guardian"
"of the valley"
"light of God (related to Uriel)"
"gift of God"
"little king"
"pool near the elm tree"
"from the court"
"lake dweller"
"Kent dale, valley settlement"
"settlement of Holston, holly stone homestead"
"broad valley, wide hill"
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.