Tex sits next to 3 phonetic neighbors — Rex, Hex, and Flex are the closest matches by sound. Most share Tex's American English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from Texas"
"God has shown favor"
"strong, enduring"
"enduring, steadfast"
"protector of people"
"black, swarthy"
"the king (colloquial interpretation)"
"Resolute protection; will-helmet"
"from the island of ships"
"counsel, advice"
"fair, white + warrior, hero"
"World ruler (from Donald prefix Don-)"
"beloved friend"
"nickname form of Roger"
"water, river (Old Norse Aire)"
"born handsome, gentle birth"
"noble, virtuous"
"wealthy guardian; prosperous protector"
"little king"
"from the rock (place surname variant)"
"coal town; settlement by the coal"
Similar sound: These names share phonetic patterns with Tex — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have American English origins, giving them the same cultural heritage as Tex.
Rhythm: Tex is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.