A toponymic surname or habitational surname or byname is a surname or byname derived from a place name, which included names of specific locations, such as the individual's place of origin, residence, or lands that they held, or, more generically, names that were derived from regional topographic features. Surnames derived from landscape/topographic features are also called topographic surnames, e.g., de Montibus, de Ponte/Da Ponte/Dupont, de Castello, de Valle/del Valle, de Porta, de Vinea.