Constantino Is A Boy’s Name Of Latin Origin. It’s A Greek, Portuguese, And Spanish Variant Of The Latin Name Constantinus, A Combination Of The Names Constans And Constantius Which Mean “constant” Or “steadfast.” If You Think Consistency And Reliability Are The Most Important Traits To Have, This Name Will Encourage Baby To Value Them, Too! Another Variant Of This Name Is Constantine, Which Was Borne By 11 Roman Emperors.