Rodnell sits next to 4 phonetic neighbors — Rodney, Ronel, and Ronell are the closest matches by sound. Most share Rodnell's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Hroda's island, famous land"
"basket-maker"
"Creative modern name; heart-centered"
"follower of Christ, anointed one"
"red king, red-haired ruler"
Similar sound: These names share phonetic patterns with Rodnell — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Rodnell.
Rhythm: Rodnell is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.