Duane sits next to 4 phonetic neighbors — Dwayne, Wayne, and Lane are the closest matches by sound. Most share Duane's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"little dark one"
"English place name surname"
"liberator of men; freer of man"
"son of the reeve, estate manager"
"noble and peaceful"
"friend"
"friend of the army, warrior's friend"
"maker of cords and ropes"
"righteous, just"
"God will save"
"eighth-born"
"remembered by God"
"narrow strait, slender (via Kyle)"
"ancient Roman family name"
"fortified camp, military settlement"
"the fifth"
"Brook land, land by the brook"
"star"
"short form of Orlando, famous land"
"passionate, ardent"
"given in honor of St. Maximilian Kolbe"
Similar sound: These names share phonetic patterns with Duane — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Duane.
Rhythm: Duane is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.