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"
"Saint James"
"God judges"
"gift of God"
"my God is the Lord, from Elijah"
"strong-willed warrior"
"excellent; unbeatable"
"fire of the Lord"
"little red-haired one"
"appointed by God"
"victory of the people"
"descendant of Bradán (salmon)"
"man from Sebaste"
"strong and brave"
"noble, strong"
"Jehovah is God; the Lord is my God"
"Yahweh is God"
"from the long ridge"
"colt herder, horse keeper"
"from the brook"
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.