Biography
Johann II. von Loon-Heinsberg, Herr zu Jülich, Heinsberg und Löwenberg-Millen, was born circa 1364 to Gottfried von Heinsberg (1325-1395) and Philippa von Jülich (1328-1390) and died 24 August 1438 of unspecified causes. He married Margarete von Gennep (c1368-1419) 1390 JL . He married Anna zu Solms-Braunfels (c1376-1433) 1423 JL .
Children
| Name | Birth | Death | Joined with |
| Johann III. von Loon-Heinsberg (c1391-1443) | |||
| Philippa von Loon-Heinsberg (c1393-1472) | |||
| Johann VIII. von Loon-Heinsberg (c1395-1459) | |||
| Wilhelm I. von Loon-Blankenheim (c1397) | |||
| Name | Birth | Death | Joined with |
| Maria von Loon-Heinsberg (1426-1502) | 1426 | 20 May 1502 | Johann von Nassau-Dillenburg (1410-1475) |
| Jakobe von Loon-Heinsberg (c1426) | |||