Peter sits next to 4 phonetic neighbors — Pieter, Pedro, and Petar are the closest matches by sound. Most share Peter's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"rock, stone"
"divine healer"
"divine"
"full of goodness"
"bright, splendid"
"bear-king, bear-man"
"son of Harry (Henry)"
"ruler of the army"
"light, bright one"
"keeper of the pantry"
"may God deliver"
"From the English surname 'son of the grieve (estate overseer)' or '..."
"fortunate, prosperous"
"Priceless; of inestimable worth"
"citizen of Rome, Roman"
"white hawk of battle"
"to tame, to subdue"
"broad meadow"
"from Hadria, of the Adriatic"
Similar sound: These names share phonetic patterns with Peter — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Peter.
Rhythm: Peter is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.