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"
"protector, she who defends"
"from Hadria (near the Adriatic)"
"life, living"
"to be of worth, to be strong"
"pure, precious gem"
"traveler from a foreign land"
"moon goddess (Selene)"
"meadow near the birch trees"
"of royal status, kingly lineage"
"house of the afflicted"
"sun goddess"
"variant of Jackie or Casey"
"open plain"
"joy, happiness, gladness"
"high tower"
"middle of the plain"
"freedom, the condition of being free"
"short form of Emma or Emilia"
"bright village"
"slender, slim and fair"
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.