Madilyn sits next to 4 phonetic neighbors — Madeline, Madeleine, and Madison are the closest matches by sound. Most share Madilyn's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"high tower"
"son of Cionaodh"
"murmuring rock on the Rhine"
"descendant of Riagan"
"protector of men"
"fair, white, pure"
"faith, trust"
"modern blended form"
"cloud"
"precious gem"
"of noble birth"
"to open (spring)"
"beautiful, graceful"
"one who resembles God"
"little child; dear child (endearment)"
"constellation in the northern sky"
"pure, clear"
"lioness"
"bright, shining"
"love, beloved"
Similar sound: These names share phonetic patterns with Madilyn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Madilyn.
Rhythm: Madilyn is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.