Orhan sits next to 4 phonetic neighbors — Orcan, Orkan, and Orhun are the closest matches by sound. Most share Orhan's Turkish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"army of the ruler, warrior chief"
"brave as a lion, fierce warrior"
"lowland; the low country"
"auspicious, blessed, fortunate"
"flowing, running"
"patient one"
"exalted, high mountain"
"Goodness, blessing, benefit"
"God saves"
"announcement, proclamation"
"sheaf of grain; biblical unit of measure"
"unharmed, complete"
"one who rejoices"
Similar sound: These names share phonetic patterns with Orhan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Turkish origins, giving them the same cultural heritage as Orhan.
Rhythm: Orhan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.