Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Name | Latitude | Longitude | Diameter (km) | Year named | Name origin |
| --- | --- | --- | --- | --- | --- |
| Aibarchin Planitia | 73.0S | 25.0E | 1,200.0 | 1997.0 | Uzbek "Alpamysh" epic tale heroine. |
| Aino Planitia | 40.5S | 94.5E | 4,985.0 | 1982.0 | Finnish heroine who became water spirit. |
| Akhtamar Planitia | 27.0N | 65.0E | 2,700.0 | 1997.0 | Armenian epic heroine. |
| Alma-Merghen Planitia | 76.0S | 100.0E | 1,500.0 | 1997.0 | Mongol/Tibet/Buryat "Gheser" epic tale heroine. |
| Atalanta Planitia | 45.6N | 165.8E | 2,050.0 | 1982.0 | Greek mythical heroine. |
| Audra Planitia | 59.8N | 92.3E | 1,860.0 | 1991.0 | Lithuanian sea mistress. |
| Bereghinya Planitia | 28.6N | 23.6E | 3,900.0 | 1985.0 | Slavic water spirit. |
| Ganiki Planitia | 40.0N | 202.0E | 5,160.0 | 1985.0 | Orochian (Siberia) water spirit, mermaid. |
| Guinevere Planitia | 21.9N | 325.0E | 7,520.0 | 1982.0 | British, wife of Arthur. |
| Helen Planitia | 51.7S | 263.9E | 4,360.0 | 1982.0 | Greek; "the face that launched 1000 ships." |
| Imapinua Planitia | 60.0S | 142.0E | 2,100.0 | 1997.0 | E. Greenland Eskimo sea mistress. |
| Laimdota Planitia | 58.0S | 117.0E | 1,800.0 | 1997.0 | Latvian myth heroine. |
| Lavinia Planitia | 47.3S | 347.5E | 2,820.0 | 1982.0 | Roman; wife of Aeneas. |
| Leda Planitia | 44.0N | 65.1E | 2,890.0 | 1982.0 | Mother of Helen, Castor. |
| Libuše Planitia | 60.0N | 290.0E | 1,200.0 | 1997.0 | Czech tales heroine, wiser of three sisters. |
| Llorona Planitia | 18.0N | 145.0E | 2,600.0 | 1997.0 | Mexican/Spanish folktale heroine. |
| Louhi Planitia | 80.5N | 120.5E | 2,440.0 | 1985.0 | Karelo-Finn mother of the North. |
| Mugazo Planitia | 69.0S | 60.0E | 1,500.0 | 1997.0 | Vietnamese tale heroine. |
| Navka Planitia | 8.1S | 317.6E | 2,100.0 | 1982.0 | East-Slavic mermaid. |
| Nsomeka Planitia | 53.0S | 195.0E | 2,100.0 | 1994.0 | Bantu culture heroine. |
| Rusalka Planitia | 9.8N | 170.1E | 3,655.0 | 1982.0 | Russian mermaid. |
| Sedna Planitia | 42.7N | 340.7E | 3,570.0 | 1982.0 | Eskimo; her fingers became seals and whales. |
| Tahmina Planitia | 23.0S | 80.0E | 3,000.0 | 1997.0 | Iranian epic heroine, wife of knight Rustam. |
| Tilli-Hanum Planitia | 54.0N | 120.0E | 2,300.0 | 1997.0 | Azeri "Ker-ogly" epic tale heroine. |
| Tinatin Planitia | 15.0S | 15.0E | 0.0 | 1994.0 | Georgian epic heroine. |
| Undine Planitia | 13.0N | 303.0E | 2,800.0 | 1997.0 | Lithuanian water nymph, mermaid. |
| Vellamo Planitia | 45.4N | 149.1E | 2,155.0 | 1985.0 | Karelo-Finn mermaid. |
Question:
what's the name origin of feature of diameter (km) 2,155.0
Answer:
Karelo-Finn mermaid.