Tessa sits next to 4 phonetic neighbors — Tess, Tessie, and Tressa are the closest matches by sound. Most share Tessa's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"song, poem"
"good, fine"
"rebellion"
"plain, flat area, field"
"Jupiter's child, Jove"
"free man"
"youthful, downy-bearded"
"dark beauty"
"devoted to Jove (Jupiter)"
"little child; dear child (endearment)"
"from 'Van' + 'Essa' (pet form of Esther)"
"princess"
"birth, natal"
"youth-producing, ever-young"
"victory of the people"
"sea circle, sea chief"
"home strength, brave power"
"heavenly, of the sky"
"rock hill, rocky mound"
Similar sound: These names share phonetic patterns with Tessa — similar vowel sounds, consonant clusters, or rhythm.
Rhythm: Tessa is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.