Johann I. von Isenburg-Limburg was born circa 1252 to Gerlach I. von Isenburg-Limburg (c1233) and Imagine von Blieskastel (c1233-1298) and died 29 September 1312 of unspecified causes. He married Elisabeth von Geroldseck (c1268-) . He married Oda von Ravensberg (c1255-1313) .
Children
| Name | Birth | Death | Joined with |
| Elisabeth von Isenburg-Limburg (-1347) | 1347 | Ulrich I. von Bickenbach (-1339) Johann II. von Katzenelnbogen (c1303-1357) | |
| Lisa von Isenburg-Limburg (c1268-) | 1268 | Heinrich III. zu Solms-Burgsolms (c1265-aft1314) | |
| Name | Birth | Death | Joined with |
| Jutta von Isenburg-Limburg (c1271-aft1334) | 1271 | 1334 | Friedrich VI. von Leiningen-Dagsburg (c1288-bef1342) |
Footnotes (including sources)
| ‡ General |