Dylam sits next to 5 phonetic neighbors — Dylan, Dillan, and Dillon are the closest matches by sound. Most share Dylam's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of the sea, great tide"
"continuous improvement, change for the better"
"birth, origin, breed"
"God has hidden, protected by God"
"improvement, change for the better"
"little fire"
"who is like God? (rhetorical, meaning no one)"
"enclosure, yard, garden"
"venerable, worthy of reverence"
"from Hesston (place name)"
"Lord, master"
"marked one"
"things to be read"
"raised by Yahweh"
"knife, cutler"
"slender, narrow"
"bright, splendid"
"from the sea"
"lasting, persistent"
Similar sound: These names share phonetic patterns with Dylam — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh origins, giving them the same cultural heritage as Dylam.
Rhythm: Dylam is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.