Thierno sits next to 4 phonetic neighbors — Tierno, Chierno, and Cherno are the closest matches by sound. Most share Thierno's Fula/Fulani-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Islamic scholar, religious teacher"
"noble valor, kingly"
"to tame, subdue"
"God grants blessing to the sorrowful"
"great positive energy"
"crystal, sparkle"
"lord, master"
"to repair, to restore, to mend"
"the greatest, most excellent"
"one who brings comfort"
"easy, effortless"
"son of James"
"the shining one, bright sky"
"ruler of the army (via Walter)"
"pre-dawn wisdom"
"natural/sky (possible Polynesian interpretation)"
"scar"
"ford near a landing stage or wharf"
"keeper of the keys"
"asked for, prayed for"
Similar sound: These names share phonetic patterns with Thierno — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Fula/Fulani origins, giving them the same cultural heritage as Thierno.
Rhythm: Thierno is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.