Mathius sits next to 5 phonetic neighbors — Matthias, Matthew, and Matteo are the closest matches by sound. Most share Mathius's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gift of God"
"descendant of Rian"
"from Thracia"
"plant that grows in moist places"
"sea and land"
"watchful, alert, awake"
"elaboration of Princeton, from Prince + ton"
"from Artagnan, a village in Gascony, France"
"God with us, divine presence"
"invented modern name"
"anointed one who carries"
"to travel leisurely"
"settlement by the bridge"
"bright navigational star in Orion"
"creative variant of Isaiah"
"Yahweh has heard"
"messenger goddess"
"God's thunder"
"God's song; singing of God"
"descendant of Nuallán"
Similar sound: These names share phonetic patterns with Mathius — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Mathius.
Rhythm: Mathius is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.