Dylan sits next to 5 phonetic neighbors — Dillon, Milan, and Julian are the closest matches by sound. Most share Dylan's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of the sea, great tide"
"high, noble (Ali) + grace (Anna)"
"star, heavenly body"
"solemn commitment"
"grace, favor"
"Malay peninsula"
"short form of Penelope"
"supplanter, one who grasps the heel"
"heavenly, from the sky"
"my God is Yahweh"
"royal power, wise ruler"
"joyful, of Jupiter"
"oak tree meadow"
"ancient, primordial"
"one who hunts"
"independent spirit"
"God is just, my witness is God"
"orchid flower (Cattleya species)"
"hollow land, forested land"
"ascent, going up"
"pure, maiden"
Similar sound: These names share phonetic patterns with Dylan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh origins, giving them the same cultural heritage as Dylan.
Rhythm: Dylan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.