Ken sits next to 4 phonetic neighbors — Kent, Kevin, and Kendall are the closest matches by sound. Most share Ken's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"handsome, born of fire"
"land of oaks"
"power of the homeland"
"noise, tumult"
"oak lake"
"narrow strait (via Kyle)"
"Winda's homestead, windy village"
"bone"
"derived from broccoli"
"land by the road"
"dark, swarthy (from Irish Dubhán)"
"God is my judge"
"joyful, bright"
"heavenly, royal, exalted"
"dog (loyal companion)"
"bearer of Christ"
"from Bryans land"
"geographic name (Rakai District, Uganda)"
"from Arcy, Norman town"
"strong warrior-man"
"man, mankind, mortal"
Similar sound: These names share phonetic patterns with Ken — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Scottish Gaelic origins, giving them the same cultural heritage as Ken.
Rhythm: Ken is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.