Efren sits next to 4 phonetic neighbors — Ephraim, Efrain, and Adrian are the closest matches by sound. Most share Efren's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"fertile, productive"
"my God is help"
"Roman, citizen of Rome"
"gift of God"
"vigilant guardian"
"of the Lucianii family"
"shining army"
"chosen, elected, the elect"
"God is gracious"
"born at Easter"
"beloved of God, strong and free"
"well-born, of noble birth"
"priceless, of inestimable worth"
"open, wide"
"guarded place"
"noble and ready"
"messenger of God, divine angel"
"of the mountains, mountain dweller"
"who is like God"
Similar sound: These names share phonetic patterns with Efren — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Efren.
Rhythm: Efren is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.