Teresa sits next to 4 phonetic neighbors — Theresa, Therese, and Tessa are the closest matches by sound. Most share Teresa's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"summer"
"beautiful, pretty"
"sacred, inviolate"
"favor, blessedness"
"white, fair, pure, blessed"
"help, helper"
"dweller by the swamp"
"musical harmony, pleasant sound"
"bright, shining"
"modesty, faithfulness (symbolic)"
"pure, chaste"
"woman from Mount Cynthus"
"bright village"
"fair, smooth, white wave"
"purity, wisdom, rarity"
"forest, wood"
"pearl"
"lily flower, purity"
"follower of Christ, anointed one"
"dark, rich (possibly referring to the dark Adriatic waters)"
"pure, innocent"
Similar sound: These names share phonetic patterns with Teresa — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Teresa.
Rhythm: Teresa is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.