Tiana sits next to 4 phonetic neighbors — Tiara, Diana, and Tatiana are the closest matches by sound. Most share Tiana's Slavic cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"fairy queen, princess"
"gift of God (variant of Maisie/Matthew)"
"the end, night rain"
"lake, waterfall (from Lynn)"
"invented name; possibly related to 'life'"
"from the Danish valley passage"
"rest, comfort (when borrowing the male Noah's meaning)"
"oak tree meadow"
"enduring, from the mace clan"
"flowering, blooming"
"curly-haired"
"pure, maiden"
"descendant of the king"
"woman from Magdala, high tower"
"from Magdala (high tower)"
"star, heavenly body"
"song thrush, songbird"
"clearing with oak trees"
"high-born chief of the heavens"
Similar sound: These names share phonetic patterns with Tiana — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Slavic origins, giving them the same cultural heritage as Tiana.
Rhythm: Tiana is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.