Biography
Heinrich XI. von Henneberg-Schleusingen was born circa 1350 to Johann I. von Henneberg-Schleusingen (1300-1359) and Elisabeth von Leuchtenberg (c1325-1361) and died 26 December 1405 of unspecified causes. He married Mechthild von Baden-Baden (c1352-1425) 4 July 1376 JL .
Children
| Name | Birth | Death | Joined with |
| Anna von Henneberg-Schleusingen (c1374-aft1415) | |||
| Elisabeth von Henneberg-Schleusingen (c1376-1444) | |||
| Mechtild von Henneberg-Schleusingen (c1380-1442) | 1380 | 1442 | Günther XXXII. von Schwarzburg-Wachsenburg (c1380-1450) |
| Wilhelm I. von Henneberg-Schleusingen (1384-1426) | 31 July 1384 | 7 July 1426 Cyprus | Anna von Braunschweig-Göttingen (1387-1426) |
| Margarethe von Henneberg-Schleusingen (c1385-1456) | |||
| Eucharius von Henneberg-Schleusingen (c1387-) | |||