Arslan sits next to 4 phonetic neighbors — Aslan, Arlan, and Arlen are the closest matches by sound. Most share Arslan's Turkic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"lion"
"firm, steadfast, hard"
"pillars, foundations"
"happy, fortunate"
"excellence, doing good"
"ruler, sovereign"
"vow to God, dedicated"
"trustworthy, reliable"
"prince, commander (related form)"
"warrior, brave man"
"patient, enduring"
"son of Ay, moon's son (via Turkish)"
"God is my judge"
"the rightly guided one"
"joy, happiness"
Similar sound: These names share phonetic patterns with Arslan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Turkic origins, giving them the same cultural heritage as Arslan.
Rhythm: Arslan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.