Zagreus sits next to 4 phonetic neighbors — Zagros, Zephyr, and Zander are the closest matches by sound. Most share Zagreus's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"great hunter, he who catches in the net"
"Lord, master"
"victory"
"Aegean Sea"
"lion of man"
"variant of Karen or Karin"
"variant of Avery: elf ruler"
"God is gracious"
"defender of men"
"light, illumination"
"ornament, decoration"
"comfort, consolation"
"the best, most excellent"
"hollow, vain (from Latin Cassius)"
"improvement, change for the better"
"of Zeus, belonging to Zeus"
Similar sound: These names share phonetic patterns with Zagreus — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Zagreus.
Rhythm: Zagreus is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.