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"
"of God, divine man"
"modern American creation"
"son of the devotee of John"
"gift of God"
"yew warrior"
"entire, all-encompassing"
"variant of Kevin (handsome, beloved)"
"he who descends"
"form of Mary, beloved"
"divine stream (Jor = stream + El = God)"
"young warrior"
"watchful, alert, awake"
"God is gracious"
"oak grove, oak tree"
"broad clearing, wide meadow"
"from, of (noble origin)"
"variant of Avery: elf ruler"
"hot springs, warm wells"
"of the sun, relating to the sun"
"son of Jeffrey, son of peace"
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.