Teigan sits next to 3 phonetic neighbors — Tegan, Reagan, and Megan are the closest matches by sound. Most share Teigan's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"beloved, dear"
"dweller near the oak trees"
"terebinth tree"
"sea (if Kai origin)"
"symbol of peace and wisdom"
"unlucky one"
"bird-like strength in the meadow"
"woman from Magdala"
"pure"
"brave as a wild boar"
"fruitful, she who will rise again"
"dark one, dark-haired"
"gift from God"
"harmony, consonance, fitting together"
"grace, favor"
"seven, completeness and luck"
"joy, gladness"
"God is gracious"
"work power, vigor and rule"
"noble, nobility"
"olive tree"
Similar sound: These names share phonetic patterns with Teigan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh origins, giving them the same cultural heritage as Teigan.
Rhythm: Teigan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.