Mathias sits next to 4 phonetic neighbors — Matthias, Tobias, and Elias are the closest matches by sound. Most share Mathias's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gift of God, gift of Yahweh"
"victory of the people"
"people's triumph"
"deer lover, champion warrior"
"brave advisor"
"strength, dominance"
"my God is the Lord"
"son, born of"
"lion (leonem)"
"conqueror, winner"
"of the bean growers (Fabii clan)"
"from Laurentum, laurel-crowned"
"protector of mankind"
"pledge of peace"
"rich protector"
"given by God"
"Frenchman"
"glory in battle"
"victory of the people"
"protector of people"
"son of Karr"
Similar sound: These names share phonetic patterns with Mathias — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Mathias.
Rhythm: Mathias is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.