Sanji sits next to 3 phonetic neighbors — Sanjay, Sanjiv, and Sandy are the closest matches by sound. Most share Sanji's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"third son; three o'clock"
"rays of light, luminous"
"mature, of sound judgment"
"my people"
"vow, pledge"
"easy, effortless"
"worthy, deserving, meritorious"
"place of convergence, meeting point"
"almighty, omnipotent"
"well-known, distinguished"
"festival, communal celebration"
"eye, vision"
"contentment, divine satisfaction"
"servant of the Bestower of gifts"
"sharp, sword-like"
"martyr, one who bears witness through sacrifice"
"ruler, lord"
"green, verdant, growing"
Similar sound: These names share phonetic patterns with Sanji — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Sanji.
Rhythm: Sanji is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.