word | | Country name |
| DRC | Congo, Democratic Republic of the | conventional long form: Democratic Republic of the Congo conventional short form: DRC local long form: Republique Democratique du Congo local short form: RDC former: Congo Free State, Belgian Congo, Congo/Leopoldville, Congo ... |
| Druk | Bhutan | conventional long form: Kingdom of Bhutan conventional short form: Bhutan local long form: Druk Gyalkhap local short form: Druk Yul |
| Duche | Luxembourg | conventional long form: Grand Duchy of Luxembourg conventional short form: Luxembourg local long form: Grand Duche de Luxembourg local short form: Luxembourg |
| Duchy | Luxembourg | conventional long form: Grand Duchy of Luxembourg conventional short form: Luxembourg local long form: Grand Duche de Luxembourg local short form: Luxembourg |
| Ducie | Pitcairn Islands | conventional long form: Pitcairn, Henderson, Ducie, and Oeno Islands conventional short form: Pitcairn Islands |
| Dutch | Curacao | Dutch long form: Land Curacao Dutch short form: Curacao Papiamentu long form: Pais Korsou Papiamentu short form: Korsou former: Netherlands Antilles; Curacao and Dependencies |
| Dutch | Indonesia | conventional long form: Republic of Indonesia conventional short form: Indonesia local long form: Republik Indonesia local short form: Indonesia former: Netherlands East Indies, Dutch East Indies |
| Dutch | Sint Maarten | Dutch long form: Land Sint Maarten Dutch short form: Sint Maarten English long form: Country of Sint Maarten English short form: Sint Maarten former: Netherlands Antilles; Curacao and Dependencies |
| Dutch | Suriname | conventional long form: Republic of Suriname conventional short form: Suriname local long form: Republiek Suriname local short form: Suriname former: Netherlands Guiana, Dutch Guiana |
| Dziko | Malawi | conventional long form: Republic of Malawi conventional short form: Malawi local long form: Dziko la Malawi local short form: Malawi former: British Central African Protectorate, Nyasaland Protectorate, Nyasaland |
| East | Bangladesh | conventional long form: People's Republic of Bangladesh conventional short form: Bangladesh local long form: Gana Prajatantri Bangladesh local short form: former: East Bengal, East Pakistan |