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"
"God is gracious"
"paradise, bliss"
"son of David"
"immense quantity, boundless"
"swift, nimble"
"land of the East Saxons"
"from the mountain"
"messenger of God"
"Yahweh is God"
"one who prevails"
"battle, fighter"
"powerful in battle (alternate interpretation)"
"supplanter who is like God (James + Michael)"
"victorious one"
"river"
"at the barns, near the granary"
"one who delivers goods, agent"
"son of the devotee of John"
"fictional invented name, no established meaning"
"independent short punchy name"
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.