Kalum sits next to 3 phonetic neighbors — Callum, Calum, and Malcolm are the closest matches by sound. Most share Kalum's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"dove"
"my God is Yahweh"
"elm (river or settlement by elm trees)"
"little king, kingly"
"storehouse of precious things"
"hitting the mark, fortunate"
"entire, all-encompassing"
"to travel leisurely"
"dark warrior, dark brown champion"
"son of Madoc (gift of God)"
"son of Brayden"
"broad, wide"
"elf counsel, wise counselor"
"son of David, from Hebrew Dodavahu (beloved)"
"messenger goddess"
"lake colony, settlement by the pool"
"thorn hedge enclosure"
"Irish Gaelic diminutive form"
"hot springs, warm wells"
"powerful in battle (alternate interpretation)"
Similar sound: These names share phonetic patterns with Kalum — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Scottish Gaelic/Latin Columba origins, giving them the same cultural heritage as Kalum.
Rhythm: Kalum is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.