[ 3 syll. da-sia, das-ia ] The baby girl name Dasia is pronounced as DaaSIY-aa- or DAA-SHaa â . Dasia is primarily used in the English language and its language of origin is Old Greek. Dasia is a form of the English, German, and Greek name Theodora. Dasia is unusual as a baby name for girls. Its usage peaked modestly in 1997 with 0.017% of baby girls being given the name Dasia. It ranked at #688 then.