Riley sits next to 4 phonetic neighbors — Ryleigh, Ryley, and Reilly are the closest matches by sound. Most share Riley's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"courageous, valiant"
"victory of the people (short for Nicholas)"
"rejoice, keeper of the keys"
"Finnish person, Norseman"
"heavenly being, celestial guardian"
"earth (in Arabic, adama)"
"from Wells, Somerset"
"best"
"may God protect"
"strong, firm, enduring"
"God apportions, assigned by God"
"man of peace"
"son of Aeson, the hero who sought the Golden Fleece"
"the crowned one"
"keeper of the pantry"
"rye-field dweller"
"little battle"
"tortoise (alternative Japanese reading)"
"bent nose"
"protector of people"
"peace town; settlement of peace"
Similar sound: These names share phonetic patterns with Riley — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish origins, giving them the same cultural heritage as Riley.
Rhythm: Riley is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.