Arantza sits next to 4 phonetic neighbors — Aranza, Aranzazu, and Arantza are the closest matches by sound. Most share Arantza's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"thornbush, place of thorns"
"dark, dark-haired"
"bright star"
"daughter of Brises"
"sorrows, pains"
"open sea, freedom"
"man-destroying"
"crystal, clear as ice"
"consecrated to God"
"of the Caecilii family"
"other Aenor, honor"
"youthful"
"small, perfect rose"
"new house, new home"
"worthy, deserving"
"supplanter, one who follows"
"solid as rock"
"possessor of goodness"
"golden, bright"
Similar sound: These names share phonetic patterns with Arantza — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Basque origins, giving them the same cultural heritage as Arantza.
Rhythm: Arantza is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.