Isidro sits next to 4 phonetic neighbors — Isidore, Isidoro, and Isador are the closest matches by sound. Most share Isidro's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gift of Isis"
"my Lord"
"priceless one, beyond praise"
"brave as a wild boar"
"flock, herd"
"life"
"brave power"
"given in honor of St. Maximilian Kolbe"
"of the Lord, belonging to God"
"faithful, loyal"
"traveler, one who returns home"
"one who frees men"
"peace, peaceful"
"YHWH is gracious"
"saint of God, blessed by God"
"counsel power, ruler's counsel"
"from the Paulus family"
Similar sound: These names share phonetic patterns with Isidro — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek Isis + doron (gift) origins, giving them the same cultural heritage as Isidro.
Rhythm: Isidro is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.