Donnell sits next to 4 phonetic neighbors — Donald, Darnell, and Donnelly are the closest matches by sound. Most share Donnell's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"world ruler, ruler of the world"
"light"
"surname of uncertain origin"
"famous land"
"red-haired, little red one"
"modern phonetic invention"
"God is salvation"
"God is witness"
"God is gracious"
"male infant, term of endearment"
"valley dweller"
"home strength, powerful ruler"
"from Saint-Denis"
"from the forest"
"peaceful, man of peace"
"healer, to heal"
"God has shown favor"
"son of Eddie"
"palm tree, upright"
"sanctuary, sacred space"
Similar sound: These names share phonetic patterns with Donnell — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic domhan (world) + val (rule) origins, giving them the same cultural heritage as Donnell.
Rhythm: Donnell is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.