Melecio Is A Boy’s Name Of Spanish Origin. This Expressive Name Means “careful” And “attentive,” Two Attributes That Baby Will No Doubt Possess. The Moniker Is Also A Respelling Of The Name Melesio, And Presents A Bunch Of Fun Nickname Options Such As Mel, Mele, Or Cio. Your Mindful And Conscientious Boy Will Know When To Be Wary And When To Take Leaps Of Faith With A Name Like This.