| Elizabeth of Bar | |
| Noble Family: | House of Bar |
| Father: | Theobald de Bar |
| Mother: | Marie de Namur |
| Spouse: | Otto, Lord of Arkel |
| Birth Date: | c. 1345 |
| Birth Place: | Hagestein |
| Death Date: | c. 1410 |
| Death Place: | Pierrepont |
Elizabeth of Bar also known as Elisabeth (Isabel) de Bar-Pierrepont, was born at Hagestein, Zeeland, Netherlands. She was the youngest daughter of Theobald de Bar, Seigneur de Pierrepont and his wife Marie de Namur.[1] When her father, Theobald, died between 2 August 1353 and 6 July 1354, and because he had no legitimate male heir, she became the heiress of Bar-Pierrepont.
She married Otto, Lord of Arkel, son of John IV, Lord of Arkel and Irmengard of Cleves, somewhere before 18 October 1360.[2] They had one son, John V, Lord of Arkel, born on September 11, 1362, in Gorinchem.
Elisabeth died before 11 May 1411 at Pierrepont, France.