Petros sits next to 5 phonetic neighbors — Peter, Pietro, and Piers are the closest matches by sound. Most share Petros's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"rock, stone"
"gift of God"
"lord, master"
"the good one"
"kingly, of royal bearing"
"the hidden one, lady"
"strife, discord"
"black youth"
"victorious one"
"personal spirit, divine guardian"
"consecrated to Mars"
"one who thinks ahead"
"lord of waters"
"firmness, constancy"
Similar sound: These names share phonetic patterns with Petros — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Petros.
Rhythm: Petros is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.