Cobb sits next to 4 phonetic neighbors — Rob, Bob, and Cob are the closest matches by sound. Most share Cobb's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"rounded lump, cobblestone"
"small fertile land plot"
"chubby, stout little one"
"noble, of noble type"
"lean, thin one"
"blessed ring, white circle (Welsh derivation)"
"renewed in spirit"
"fond of horses"
"powerful warrior"
"the king"
"hill, elevated"
"invented name with La- prefix (the) and Voris (from the ford, Dutch..."
"eminence, hill"
"paulownia tree, nobility (桐)"
"grey, grey-haired"
"broad fortified settlement"
Similar sound: These names share phonetic patterns with Cobb — 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 Cobb.
Rhythm: Cobb is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.