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"
"land, territory"
"ruler of the army"
"person with extraordinary talent"
"mercy, eternal"
"love's path"
"great tide, sea current"
"God is gracious"
"little red one"
"bought land, purchased territory"
"one who lays tiles"
"beauty, handsomeness"
"God is gracious (via Sean/John)"
"summoner, one who calls forth"
"ruler, king (from -rick suffix)"
"loved, beloved"
"archer, warrior of the yew"
"crowned with laurel, laurel bearer"
"son of Walter, ruler of the army"
"remembered by the Lord"
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.