Tessi sits next to 5 phonetic neighbors — Tessa, Tessie, and Bess are the closest matches by sound. Most share Tessi's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from Thera (island)"
"lion-hearted"
"one who imagines possibilities"
"steadfast, faithful, constant"
"born on Tuesday"
"Variant of Sylvia; from the forest; woodland"
"settlement on the hill"
"moon goddess, lunar"
Similar sound: These names share phonetic patterns with Tessi — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Tessi.
Rhythm: Tessi is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.