Norman sits next to 3 phonetic neighbors — Morton, Morgan, and Gordon are the closest matches by sound. Most share Norman's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"man from the north, Northman"
"firm, steadfast (metaphorical)"
"hill, high ground"
"of the earth"
"rule of the spear, spear ruler"
"ruler of the land"
"strong as a lion"
"rye land; land where rye grows"
"one who pursues"
"strong-willed warrior"
"bear"
"son of Carr, marshy land"
"may God protect"
"territory of Owen"
"pleasantness, delight"
"divine, godly"
"great river, wide flowing water"
"son of Jens (John)"
"God has given"
"variant of Pearson: son of Piers"
"remembered by God"
Similar sound: These names share phonetic patterns with Norman — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French origins, giving them the same cultural heritage as Norman.
Rhythm: Norman is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.