Osiris sits next to 3 phonetic neighbors — Cyrus, Orion, and Aldric are the closest matches by sound. Most share Osiris's Ancient Egyptian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"throne of the eye (possible etymology)"
"slender and fair"
"rule of the spear, spear ruler"
"God has remembered, remembered by God"
"ever high, the highest"
"jet-black, swift"
"rib, side"
"primordial deity, elder god"
"high stronghold, fort on the headland"
"may God protect"
"son of John (via Jack)"
"son of John"
"defender of men"
"alert, watchful"
"one who has made pilgrimage to the Holy Land"
"spear, battle"
"gift of the Lord"
"strong and courageous"
"beginning, origin"
"crew, group of companions"
"gentle, tamed"
Similar sound: These names share phonetic patterns with Osiris — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Ancient Egyptian origins, giving them the same cultural heritage as Osiris.
Rhythm: Osiris is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.