Sibylle Elisabeth Welf von Braunschweig-Dannenberg was born 1576 to Heinrich von Braunschweig-Dannenberg (1533-1598) and Ursula von Sachsen-Lauenburg (1552-1620) and died 1630 of unspecified causes. She married Anton II. von Oldenburg-Delmenhorst (1550-1619) 1600 .
Children
| Name | Birth | Death | Joined with |
| Anton Heinrich von Oldenburg-Delmenhorst (1604-1622) | |||
| Christian IX. von Oldenburg-Delmenhorst (1612-1647) | |||
| Sophie Ursula von Oldenburg (1601-1642) | 10 December 1614 | 1642 | Albrecht Friedrich von Barby-Mühlingen (1597-1641) |
| Katharine Elisabeth von Oldenburg (1603-1649) | |||
| Anna von Oldenburg (1605-1668) | 28 March 1605 | 12 December 1688 | Johann Christian von Schleswig-Holstein-Sonderburg-Franzhagen (1607-1653) |
| Klara von Oldenburg (1606-1647) | |||
| Sibylle Marie von Oldenburg (1608-1640) | |||
| Dorothea von Oldenburg (1609-1636) | |||
| Sidonie von Oldenburg (1611-1650) | |||
| Emilie Antonie von Oldenburg (1614-1670) | 15 June 1614 Delmenhorst, Lower Saxony, Germany | 4 December 1670 Rudolstadt, Thuringia, Germany | Ludwig Günther I. von Schwarzburg-Rudolstadt (1581-1646) |
| Juliane von Oldenburg (1615-1691) | |||