Biography
Irmgard von Rietberg was born circa 1478 to Johann I. von Rietberg (c1450-1516) and Margarethe zur Lippe (c1452-aft1490) and died 1540 of unspecified causes. She married Otto VIII. von Tecklenburg-Schwerin (c1465-1534) 1492 JL .
Children
| Name | Birth | Death | Joined with |
| Konrad von Tecklenburg-Schwerin (1493-1557) | 1493 | 16 March 1557 | Mechtild von Hessen (c1490-1558) |
| Anna von Tecklenburg-Schwerin (1500-1554) | 1500 | 27 November 1554 | Philipp zu Solms-Braunfels (1494-1581) |
| Elisabeth von Tecklenburg-Schwerin (c1522-) | |||