Tanya sits next to 4 phonetic neighbors — Tania, Tonya, and Tara are the closest matches by sound. Most share Tanya's Russian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"fairy queen"
"heaven (spelled backward)"
"moonlight, cool radiance"
"each of the two"
"just, righteous, upright"
"noble kind"
"modern invented extension of Quinn"
"lake or pool (from Welsh -lyn suffix)"
"noble and gentle"
"divine love, Cupid"
"friend, beloved companion"
"free, community-minded spirit"
"justice of God, my witness is God"
"of noble character (from aethel)"
"oak tree (Hebrew) and halo of moonlight (Turkish)"
"white hero"
"pearl; precious gem"
"sea of bitterness"
"variant of Kira, possibly meaning sun or throne"
"narrow channel, slender"
Similar sound: These names share phonetic patterns with Tanya — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Slavic folk etymology origins, giving them the same cultural heritage as Tanya.
Rhythm: Tanya is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.