Jiraiya sits next to 3 phonetic neighbors — Giraiya, Jiraya, and Hiraya are the closest matches by sound. Most share Jiraiya's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"young thunder"
"spiritually favored, beatified"
"companion, fellow traveler"
"Yahweh has created"
"brook, running water"
"from the city of lions"
"dark-skinned, Moorish"
"protector of men"
"brave in battle, vigilant"
"James reversed — an ananym honoring the name James"
"consecrated to God"
"highest point, God's place"
"open, beginning"
"ruler of the household"
"dark, dark-haired"
"son of James"
"son of Jett, black gemstone"
"grace of God, king"
"bold, mighty"
"vigor and power"
"place by the forest"
Similar sound: These names share phonetic patterns with Jiraiya — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Jiraiya.
Rhythm: Jiraiya is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.