Feliz sits next to 3 phonetic neighbors — Felix, Felipe, and Elias are the closest matches by sound. Most share Feliz's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"happy, fortunate"
"hill of the people"
"healing, wholesome"
"brave advisor"
"forester, keeper of the forest"
"wide, broad"
"wolf"
"noble"
"surname of English origin, possibly place or occupational"
"heavenly messenger"
"great, venerable"
"meadow by the bow or bend"
"Herd farm or livestock enclosure"
"excellence, superior quality"
Similar sound: These names share phonetic patterns with Feliz — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin via Spanish origins, giving them the same cultural heritage as Feliz.
Rhythm: Feliz is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.