Donnie sits next to 4 phonetic neighbors — Danny, Ronnie, and Lonnie are the closest matches by sound. Most share Donnie's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"world ruler"
"airplane, aircraft"
"fire of God"
"grace, elegance, pride"
"the Lord is my God"
"divine reward"
"bright, splendid"
"modern invented name, unique spirit"
"nonconformist, free spirit"
"guiding spirit"
"new house"
"God is gracious"
"modern invented name"
"handsome, beautiful"
"God is gracious (related to Yohanan)"
"descendant of the salmon"
"moon"
"unbranded cattle; one who refuses to conform"
"life's path, quest"
Similar sound: These names share phonetic patterns with Donnie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Scottish Gaelic origins, giving them the same cultural heritage as Donnie.
Rhythm: Donnie is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.