Allistor sits next to 5 phonetic neighbors — Alastair, Alasdair, and Alexander are the closest matches by sound. Most share Allistor's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"defender of men"
"Alert; lively; quick"
"God is good"
"from Laurentum (city of laurels)"
"bright, white"
"swift one"
"divine, heavenly"
"mighty in battle"
"of the Khasi people, born of the Khasi"
"modern variant; to heal (via Jason/Jace connection)"
"weary, shaped by use"
"supplanter, God will establish"
Similar sound: These names share phonetic patterns with Allistor — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek Alexandros via Scottish Gaelic origins, giving them the same cultural heritage as Allistor.
Rhythm: Allistor is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.