Rockland sits next to 5 phonetic neighbors — Roland, Rowland, and Rocco are the closest matches by sound. Most share Rockland's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"rocky land, land of rock"
"new house of God"
"pledge, oath, measure"
"road by the waterfall"
"western settlement"
"legendary divine smith (from Völundr)"
"modern invented form of Jackson"
"mercy, eternal"
"modern American creative formation"
"named for gold prospector Joe Juneau"
"variant of Braylen or Graylen"
"settlement by the brushwood"
"from the branch, related to branches"
"Holy hill, place of spiritual ascent"
"son of Kyle"
"guardian of riches"
"modern invented name (Dre + lyn blend)"
"red-haired"
"from Colt's farm"
"slender, narrow (from Irish Caolan)"
"defender of men"
Similar sound: These names share phonetic patterns with Rockland — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English/Old Norse origins, giving them the same cultural heritage as Rockland.
Rhythm: Rockland is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.