Meaning A boy's name of Portuguese origin, it means "great destroyer." Origin of Casimiro Portuguese +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Casimiro Similar Names Kazimierz Kazimir Tomas Arihaan Tano Aghat Arhant Arindam Devantakanashakarin Perseus Year by Year Popularity of Casimiro