2 ms·Mateo is apparently a very popular name that I've never heard of or seen anyone go by! Weird.by com2kid 4y agoMateo is apparently a very popular name that I've never heard of or seen anyone go by! Weird.rafram 4y agoAs in San Mateo. The Spanish equivalent of Matthew/Matt.Sateeshm 4y agoThe only Mateo I've seen is from NBC SuperStore