For this Cei Mario there are 2 different names on Yasni.
In the ranking of the most common first names Cei Mario is on position 4589.
Male first name (English): Cei; Unknown (Arthurian legend), in the Arthurian legend is Cei (or Kay Kay or Kay), one of the knights of the Round Table on the origin of the name is unclear, perhaps Celtic / Welsh, perhaps derived from Latin name 'Caius'
Male first name (German, Italian, Spanish, Portuguese): Mario, Latin (Roman family); mas = male, originally a ancient Roman family, whose origin is not explained certain; possible link with the name of the God of War 'Mars' or 'mas' / 'maris' 'male'