Rohnan sits next to 4 phonetic neighbors — Ronan, Ronin, and Brennan are the closest matches by sound. Most share Rohnan's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"little seal"
"home ruler, industrious"
"God is my oath, my God is abundance"
"entry, means of approach"
"gift of God"
"flower (possibly)"
"free man"
"the Lord is mine"
"tough, masculine, rugged"
"little fort dweller"
"will, desire, divine purpose"
"prosperity, fair weather, rich ore vein"
"One who operates a press; press forward with urgency"
"exquisitely beautiful, charming"
Similar sound: These names share phonetic patterns with Rohnan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish origins, giving them the same cultural heritage as Rohnan.
Rhythm: Rohnan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.