Knox sits next to 3 phonetic neighbors — Fox, Cox, and Knocks are the closest matches by sound. Most share Knox's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"round hill"
"church official overseeing ten"
"fortified hill"
"God has healed"
"gift of God"
"God is gracious"
"healer, to heal"
"virile one"
"son of the valiant one"
"may God protect"
"famous warrior, renowned in battle"
"defender of men"
"merciful, gentle"
"winding valley"
"son of Jens (son of John)"
"son"
"God will uplift, exalt"
"my God is Yahweh"
"homestead by a stream"
"wealthy guardian"
"he who descends, descent"
Similar sound: These names share phonetic patterns with Knox — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English/Scottish origins, giving them the same cultural heritage as Knox.
Rhythm: Knox is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.