Macallan sits next to 4 phonetic neighbors — Callum, McCallen, and Malcolm are the closest matches by sound. Most share Macallan's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of the devotee of Saint Fillan"
"son of Matthew"
"one of the Franks (a Germanic tribe)"
"sacred name"
"highest point, mountaintop"
"my God is the Lord"
"son of Hans"
"army ruler, commander"
"protector of mankind"
"he who grasps the heel"
"sun and sea (Hawaiian compound)"
"ruler of the people"
"man, husband"
"shining, bright, luminous"
"renowned, famous"
"morning glory, morning well (depending on kanji)"
"sickness; weakness"
"all right, in harmony"
"bearer of Christ, Christ-carrier"
Similar sound: These names share phonetic patterns with Macallan — 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 Macallan.
Rhythm: Macallan is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.