Fermin sits next to 3 phonetic neighbors — Herman, Fernando, and Ferris are the closest matches by sound. Most share Fermin's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"firm, steadfast"
"beloved of God"
"black"
"my friend, my companion"
"home king"
"eagle ruler, eagle power"
"worthy of wonder"
"deliverer, savior"
"light of God (related to Uriel)"
"gracious, dear one"
"courageous, valiant"
"hidden valley river"
"prosperous companion"
"God will establish, raised by God"
"warrior, martial"
"work-power, industrious ruler"
"future, what is yet to come"
"heard by God"
"given by God"
Similar sound: These names share phonetic patterns with Fermin — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Fermin.
Rhythm: Fermin is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.