Mathis sits next to 5 phonetic neighbors — Mattis, Matthias, and Mathias are the closest matches by sound. Most share Mathis's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gift of God"
"home ruler"
"of the night"
"lapis lazuli (the stone)"
"God has shown favor"
"power of the homeland"
"worthy of wonder"
"God has remembered"
"runner, messenger"
"from the long shore"
"manly, strong"
"army man, warrior"
"God's staff, royal scepter"
"gift of the goddess"
"water meadow"
"shining, bright (via Hebrew Meir)"
"son of Talmai, son of the furrows"
"lord of the marches, border lord"
Similar sound: These names share phonetic patterns with Mathis — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Mathis.
Rhythm: Mathis is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.