Magnus sits next to 3 phonetic neighbors — Marcus, Maximus, and Angus are the closest matches by sound. Most share Magnus's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"great"
"severe, strict"
"warrior"
"divine staff, royal pillar"
"Thor's stone"
"bald (short for Calvin from Latin Calvinus)"
"the twin"
"wanderer, Gaelic speaker"
"wolf lover"
"Viking homeland (Scandinavia)"
"dove"
"handsome, cheerful"
"wise friend"
"from Denmark, a Dane"
"dove"
"fire (Irish equivalent Aodh)"
"rock, harmony"
"son of Aodh (fire)"
"the cleansing one"
"the brown one"
"dark blue water"
Similar sound: These names share phonetic patterns with Magnus — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Magnus.
Rhythm: Magnus is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.