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"
"new, sky (nav element)"
"God is willing"
"enlightened, bright, clear"
"spear warrior"
"beloved friend"
"manly warrior ruler"
"elm grove"
"ordained minister's helper"
"farm on stony ground"
"running (speed)"
"early rain, autumn rain"
"Lord have mercy"
"modern invented combination of grey + len"
"son of Jens"
"from Indiana (land of Indians)"
"God sows, God scatters seed"
"venerable, worthy of reverence"
"a legend, one destined for greatness"
"hill, ridge, small summit"
"father of peace"
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.