Madix sits next to 5 phonetic neighbors — Maddox, Phoenix, and Calix are the closest matches by sound. Most share Madix's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of good fortune"
"modern coined name, possibly hillside light"
"griffin (mythical creature symbolizing strength)"
"supplanter, one who takes another's place"
"divine judge"
"God is gracious"
"unity, one"
"open lands, clearing"
"man from South Munster (southern Ireland)"
"olive warrior"
"land of the East Saxons"
"heather-covered hill"
"chromium element"
"prior, head of a priory or monastery"
"modern American invented name"
"fire of God"
"yew warrior"
"enclosed field"
"red (from Spanish rojas)"
"initials name, no fixed meaning"
Similar sound: These names share phonetic patterns with Madix — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh Madawc/Madoc origins, giving them the same cultural heritage as Madix.
Rhythm: Madix is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.