Meaning A girl's name of Gaelic origin, it means "Goodness." Origin of Decla Gaelic , Irish +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Decla Similar Names Diorbhall Ethne Siubhan Trina Aimil Beitris Eihhlin Giorsal Moibeal Sighle Year by Year Popularity of Decla