Jiro sits next to 3 phonetic neighbors — Giro, Zero, and Gyro are the closest matches by sound. Most share Jiro's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright, clear second child"
"oar (of a boat)"
"mountain village; reason of the mountains (Japanese interpretation)"
"great positive energy"
"gathering place, pool"
"spiritual power, authority, prestige"
"harbor, port"
"diminutive of Antonio"
"king; the beautiful one (from Armenian legend)"
"good change, positive transformation"
Similar sound: These names share phonetic patterns with Jiro — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Jiro.
Rhythm: Jiro is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.