Biography
Johann IV. von Werdenberg was born circa 1412 to Eberhard II. von Werdenberg (c1355-1416) and Anna von Zimmern (c1360-1445) and died 27 April 1465 of unspecified causes. He married Elisabeth von Württemberg (c1414-1460) 2 August 1429 JL .
Children
| Name | Birth | Death | Joined with |
| Agnes von Werdenberg-Heiligenberg (1434-1467) | 1434 | 13 December 1467 | Jost Nikolaus I. von Hohenzollern (1433-1488) |
| Georg III. von Werdenberg-Sargans (c1442-1500) | 1442 | 12 March 1500 | Katherine von Baden-Baden (1449-bef1484) |
| Elisabeth von Werdenberg (-) | |||