(or simply ; , Severna Dobrudzha) the part of Dobruja within the borders of Romania.

Southern Dobruja or South Dobruja (or simply , ; or , ), also the Quadrilateral, is an area of north-eastern Bulgaria comprising Dobrich and Silistra provinces, part of the historical region of Dobruja.

The Despotate of Dobruja or Principality of Karvuna (or ; or ) was a 14th-century quasi-independent Bulgarian polity in the region of modern Dobruja, that split off from the Second Bulgarian Empire under the influence of the Byzantine Empire.