Duri would be a funny name for the youngest twin, and the firstborn twin could be Hana, which means "one".
― Anonymous User 8/28/2017
1
To clarify about the meaning, It does mean "two," but it is used specifically in Gyeongsangbuk-do (North Gyeongsang Province). In Standard Korean, it is read as 두 (du) or 둘 (dul), the latter used when in isolation. [noted -ed]