Clarke sits next to 4 phonetic neighbors — Clark, Blake, and Drake are the closest matches by sound. Most share Clarke's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"clerk, scholar, scribe"
"uncertain; possibly Romani personal name with regional meaning"
"high and mighty, chief"
"from the Leyden region"
"son of him who abounds in furrows"
"work-power, industry"
"phonetic American invention"
"one who defies authority, resister"
"building material, beam"
"healthy, wise"
"beautiful, handsome"
"lake dweller, one from the lake"
"from Nimes (fabric origin)"
"champion, winner"
"sun child, bright sun"
"flowing river"
"born of light"
"by the brook"
"measured flow, regular beat"
"steward, estate manager"
Similar sound: These names share phonetic patterns with Clarke — 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 Clarke.
Rhythm: Clarke is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.