Rock sits next to 3 phonetic neighbors — Roc, Ruck, and Brock are the closest matches by sound. Most share Rock's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"stone, solid mass"
"arhat, enlightened Buddhist monk"
"settlement of the red family"
"descendant of Bladen"
"lotus flower"
"little king"
"son of the home ruler"
"protector of people"
"oak tree"
"strong grip, paw"
"beloved friend"
"modern nature compound name"
"famous in the land, renowned territory"
"jackdaw (intelligent crow-family bird)"
"spear rule, lord of the spear (via Gerald)"
"place of glamour and royalty (associative)"
"young man, boy"
"Yahweh remembers"
"rejoicing, celebration"
"counsel wolf"
"healer"
Similar sound: These names share phonetic patterns with Rock — 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 Rock.
Rhythm: Rock is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.