Mack sits next to 4 phonetic neighbors — Max, Mac, and Jack are the closest matches by sound. Most share Mack's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of"
"son of Jens (son of John)"
"bowman, archer"
"ardor, enthusiasm, fierceness"
"God is gracious"
"from the settlement by the stone"
"army man, soldier"
"royal ruler"
"Frenchman"
"from the green valley"
"of the ancient Roman Cassia gens"
"kingly, of royal blood"
"renowned in battle"
"son of Jack"
"greatest, largest"
"from Reims"
"stoneworker (from Mason)"
"supplanter"
"to tame, to subdue"
Similar sound: These names share phonetic patterns with Mack — 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 Mack.
Rhythm: Mack is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.