Morgan sits next to 3 phonetic neighbors — Moran, Morgen, and Margo are the closest matches by sound. Most share Morgan's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sea circle, sea chief"
"modern blended form"
"ugly head (from ceann donn)"
"my God has answered"
"sparkle, glitter"
"myrtle leaf"
"bay laurel"
"free-born, noble"
"precious gem, pearl of great price"
"little red one"
"foreign riches"
"one who will rise again"
"grassy field, open pasture"
"one who works the land"
"champion, one who attains"
"son of Emery, brave and powerful"
"land of the Aryans, noble"
"oak tree clearing"
"rose festival"
"joy, music"
"descendant of Riagan"
Similar sound: These names share phonetic patterns with Morgan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh origins, giving them the same cultural heritage as Morgan.
Rhythm: Morgan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.