Thomas sits next to 3 phonetic neighbors — Tomas, Thomson, and Thom are the closest matches by sound. Most share Thomas's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Twin"
"from the Antonius Roman family"
"young warrior"
"cloth walker, one who treads cloth"
"phonetic creation, no traditional meaning"
"soldier"
"God is gracious"
"one who builds with stone"
"cask maker, craftsman"
"rye clearing"
"spotted stone"
"will-helmet, resolute protector"
"heart, mind, spirit"
"son of the south"
"Yahweh is gracious"
"strong, powerful one"
"permanent, long-lived"
"protector of men"
"God has healed"
Similar sound: These names share phonetic patterns with Thomas — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Aramaic origins, giving them the same cultural heritage as Thomas.
Rhythm: Thomas is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.