Nelson sits next to 3 phonetic neighbors — Nelly, Elson, and Kelson are the closest matches by sound. Most share Nelson's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of Neil"
"all-wise, all-knowing"
"twin"
"of the Drusus family"
"famous warrior"
"farmer, earth worker"
"farewell, goodbye"
"good victory"
"fertile plain (if derived from Sharon)"
"noble friend"
"descendant of the dark stranger"
Similar sound: These names share phonetic patterns with Nelson — 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 Nelson.
Rhythm: Nelson is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.