Phoenix sits next to 3 phonetic neighbors — Felix, Phineas, and Lennox are the closest matches by sound. Most share Phoenix's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"dark red, crimson"
"Jehovah is my God"
"Roman pilgrim"
"asked for, prayed for"
"God is gracious (via John/Zane)"
"descendant of the little king"
"horseman, knight"
"park keeper"
"one who is celebrated"
"man of peace"
"son of Jack"
"firm foundation"
"God's gift"
"elf counsel, supernatural wisdom"
"black gemstone; jet"
"one who saws wood"
"bowman, archer"
"cheerful settlement"
"one who bails, deliverer"
Similar sound: These names share phonetic patterns with Phoenix — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Phoenix.
Rhythm: Phoenix is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.