Tj sits next to 4 phonetic neighbors — DJ, CJ, and AJ are the closest matches by sound. Most share Tj's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gift of God (Thomas) + supplanter (James)"
"shining, bright"
"sea stone, seaside settlement"
"one who tills the land, farmer"
"tailor, cloth cutter"
"white, fair-complexioned"
"little fire (via Aidan)"
"elegant"
"descendant of Ógán"
"named after father"
"talent, ability, brilliance"
"reddish complexion"
"supplanter"
"born at daylight"
"pledge, hostage"
"courteous, well-bred, polite"
"God has strengthened"
"of the river (if -von is from Welsh afon)"
"prince, ruler"
Similar sound: These names share phonetic patterns with Tj — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew/English origins, giving them the same cultural heritage as Tj.
Rhythm: Tj is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.