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"
"of the sword"
"more luminous, brighter"
"martyr, one who bears witness through sacrifice"
"lord, prince, chief"
"mind, consciousness"
"Lord Shiva; the northeast"
"praiseworthy"
"the greatest"
"eye, vision"
"worshipper of the generous God"
"worthy, deserving, meritorious"
"well-known, distinguished"
"celebration, festivity"
"owner, master"
"nobleman, honorable one"
"easy, effortless"
"one who journeys, wayfarer"
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.