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"
"party, folk gathering with music"
"God is my oath"
"gracious judge"
"pure"
"steward, manager"
"queenly dignity, regal bearing"
"bright, shining light"
"Mary of Solitude (Maria de la Soledad)"
"God is gracious"
"little one (diminutive suffix)"
"king's meadow, royal clearing"
"sunny place, sunshine"
"protector of humanity"
"coral, sea jewel"
"white island"
"protector of men"
"fidelity, eternity (symbolic)"
"spiritually renewed"
"jasmine flower"
"Ceol's island, ship island"
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.