What does Normannus mean in Latin?

Normannus, a adjective, means “Norman, of or pertaining to Normans”.

adjectivefirst/second-declension adjective

Normannus¹

Normannus (feminine Normanna, neuter Normannum)

Ecclesiastical[norˈman.nus]

singular
form	masculine	feminine	neuter
nominative	Normannus	Normanna	Normannum
genitive	Normannī	Normannae	Normannī
dative	Normannō	Normannae	Normannō
accusative	Normannum	Normannam	Normannum
ablative	Normannō	Normannā	Normannō
vocative	Normanne	Normanna	Normannum

plural
form	masculine	feminine	neuter
nominative	Normannī	Normannae	Normanna
genitive	Normannōrum	Normannārum	Normannōrum
dative	Normannīs	Normannīs	Normannīs
accusative	Normannōs	Normannās	Normanna
ablative	Normannīs	Normannīs	Normannīs
vocative	Normannī	Normannae	Normanna

Ultimately from Old Norse norðmaðr (“man of the North, Norseman”); attested from the 9th century. Cognate with Old French Normant.

noun · masculinesecond declension

Normannus²

Normannus m (genitive Normannī)

Ecclesiastical[norˈman.nus]

Ultimately from Old Norse norðmaðr (“man of the North, Norseman”); attested from the 9th century. Cognate with Old French Normant.