Tiffay sits next to 4 phonetic neighbors — Tiffany, Tiffani, and Tiffy are the closest matches by sound. Most share Tiffay's English-origin cluster, so the rhythm and vowel shape carry across the list.
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"manifestation of God"
"diamond, precious stone"
"gentle girl, gentle woman"
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"rose"
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"God is just; my witness. A feminine form of the Hebrew name Adlai, ..."
"other, foreign, noble"
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Similar sound: These names share phonetic patterns with Tiffay — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek via Latin origins, giving them the same cultural heritage as Tiffay.
Rhythm: Tiffay is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.