Sabastian sits next to 3 phonetic neighbors — Sebastian, Bastian, and Sevastian are the closest matches by sound. Most share Sabastian's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from Sebastos (venerable city)"
"warrior (via Irish Kane)"
"will and peace"
"anointed one"
"to set, to place, to establish"
"bright heart, brilliant mind"
"safe haven, shelter, refuge"
"calm, serene, protective"
"modern coinage"
"elevated, sublime, lofty"
"modern variant of Milan/Milen"
"God-like, divine warrior"
"from the city of Troy"
"related to Everett (brave boar)"
"wealthy friend"
"son of Jack"
"little drop of water"
"rejoice, be glad (via Gaius/Caio)"
"shining, bright (via Hebrew Meir)"
"holy one (of Dewi/David)"
"firm, steadfast"
Similar sound: These names share phonetic patterns with Sabastian — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Sabastian.
Rhythm: Sabastian is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.