Pedro sits next to 3 phonetic neighbors — Peter, Piero, and Pierre are the closest matches by sound. Most share Pedro's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"rock, stone"
"God is salvation, Yahweh saves"
"of the Sergii clan"
"lord of the manor"
"of Mars, consecrated to the god of war"
"warrior"
"Frenchman"
"attendant at religious ceremonies"
"manly, brave"
"to hold fast, to restrain"
"peaceful, gentle as a dove"
"famous warrior, renowned in battle"
"helper, one who helps"
"manly, brave"
"conqueror, winner"
"greatest Aemilian (of the Aemilian family)"
"the greatest"
"raised by Yahweh"
"of the Lord, belonging to God"
Similar sound: These names share phonetic patterns with Pedro — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek via Spanish origins, giving them the same cultural heritage as Pedro.
Rhythm: Pedro is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.