Tzvi sits next to 2 phonetic neighbors — Zvi and Stevie are the closest matches by sound. Most share Tzvi's Hebrew-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"deer, gazelle"
"land of purple, merchant"
"God is my ornament"
"evening, twilight, the pleasant time of day"
"fruitful, doubly fruitful"
"peaceful, whole, complete"
"strength, permanence"
"God has healed"
"my power is God"
"motion, movement"
"God is my salvation"
"God has helped"
"one who supplants, heel-grabber"
"strong, enduring"
"heart"
"may God protect (alternative interpretation)"
"victorious protection (Sigmund root)"
Similar sound: These names share phonetic patterns with Tzvi — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Tzvi.
Rhythm: Tzvi is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.