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"
"heather field, heathland clearing"
"my God has answered"
"universal, entire"
"gem, jewel"
"bright green gemstone"
"fair, smooth, white wave"
"feminine of Michael (gift of God in folk etymology)"
"king's meadow, royal clearing"
"friend"
"God is my oath"
"all, completely beautiful"
"gracious one"
"marshy clearing"
"freedom, the condition of being free"
"eagle valley"
"new"
"woman from Magdala, high tower"
"wished-for child, sea of bitterness"
"jovial, cheerful, good-humored"
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.