Erasmus sits next to 5 phonetic neighbors — Erasmo, Desiderius, and Erastos are the closest matches by sound. Most share Erasmus's Dutch-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"beloved, desired"
"council friend"
"called forth, gloriously summoned"
"red king"
"slope, hillside"
"resolute protector, will-helmet"
"gentle, mild-mannered"
"wealth, fortune, prosperity"
"sun, moon"
"princess, noblewoman"
"gift of the ocean"
"botanical variant name"
"bright fame"
"famous wolf"
"hare's meadow, hare clearing"
"Honor"
Similar sound: These names share phonetic patterns with Erasmus — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Erasmus.
Rhythm: Erasmus is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.