Kol sits next to 4 phonetic neighbors — Cole, Kole, and Coal are the closest matches by sound. Most share Kol's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"dark, coal-black"
"from the rippling water"
"large homestead, big village"
"of Mark, belonging to Mars"
"of the highest power or authority"
"people's champion"
"born of light"
"God strengthens"
"of the forest (via Silvanus root)"
"strong, healthy"
"son of Hans"
"handsome, well-born"
"bright-headed"
"spear"
"remembered by Yahweh"
"knife maker"
"completion, eternity"
"bearer of Christ, Christ-carrier"
"sun child, bright sun"
"volcanic tuff (durable rock)"
"harmonious regularity"
Similar sound: These names share phonetic patterns with Kol — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English/Norse origins, giving them the same cultural heritage as Kol.
Rhythm: Kol is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.