Otto I. von HessenAge: 56 years1272–1328
- Name
- Otto I. von Hessen
| Birth | 1272 27 24 |
| Death of a mother | Adelheid von Braunschweig June 12, 1274 (Age 2 years) |
| Death of a paternal grandmother | Sophie von Thüringen May 29, 1275 (Age 3 years) |
| Marriage of a parent | Heinrich I. von Hessen — Mechthild van Kleef — View this family after 1275 (Age 3 years) |
| Birth of a half-brother | Johann von Hessen 1278 (Age 6 years) |
| Death of a sister | Elisabeth die ältere von Hessen 1293 (Age 21 years) |
| Death of a brother | Heinrich der jüngere von Hessen 1298 (Age 26 years) |
| Birth of a son #1 | Heinrich II. der Eiserne von Hessen before 1302 (Age 30 years) |
| Birth of a son #2 | Ludwig der Junker 1305 (Age 33 years) |
| Death of a father | Heinrich I. von Hessen December 21, 1308 (Age 36 years) |
| Birth of a daughter #3 | Elisabeth von Hessen about 1309 (Age 37 years) |
| Death of a half-brother | Johann von Hessen February 14, 1311 (Age 39 years) |
| Death of a sister | Adelheid von Hessen 1317 (Age 45 years) |
| Marriage of a child | Heinrich II. der Eiserne von Hessen — Elisabeth von Thüringen — View this family 1321 (Age 49 years) |
| Occupation | Landgraf (count to the emperor) |
| Death | January 17, 1328 (Age 56 years) |
| Family with parents |
| father |
Heinrich I. von Hessen Birth: June 24, 1244 37 20 Death: December 21, 1308 — Marburg an der Lahn, Hessen, Germany |
| mother |
Adelheid von Braunschweig Birth: estimated as close to sibling(s) — about 1248 44 39 Death: June 12, 1274 — Marburg an der Lahn, Hessen, Germany |
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Marriage: September 10, 1263 — |
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9 years himself |
Otto I. von Hessen Birth: 1272 27 24 — Marburg, Hessen Nassau, Preußen Death: January 17, 1328 — Marburg, Hessen Nassau, Preußen |
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-3 years elder sister |
Adelheid von Hessen Birth: 1268 23 20 Death: 1317 |
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-3 years elder brother |
Heinrich der jüngere von Hessen Birth: 1264 19 16 Death: 1298 |
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4 years elder sister |
Mechthild von Hessen Birth: 1267 22 19 Death: 1332 |
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3 years elder sister |
Elisabeth die ältere von Hessen Birth: 1269 24 21 Death: 1293 |
| Father’s family with Mechthild van Kleef |
| father |
Heinrich I. von Hessen Birth: June 24, 1244 37 20 Death: December 21, 1308 — Marburg an der Lahn, Hessen, Germany |
| step-mother |
Mechthild van Kleef Birth: estimated as after parents' marriage — 1235 21 20 Death: 1304 — December 21, 1309 |
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Marriage: after 1275 — |
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4 years half-brother |
Johann von Hessen Birth: 1278 33 43 Death: Pest (plague) — February 14, 1311 — Kassel, Hessen, Germany |
| Family with Adelheid von Ravensberg |
| himself |
Otto I. von Hessen Birth: 1272 27 24 — Marburg, Hessen Nassau, Preußen Death: January 17, 1328 — Marburg, Hessen Nassau, Preußen |
| wife |
Adelheid von Ravensberg Birth: 1270 24 32 — Ravensberg, Westphalen, Preußen Death: April 13, 1339 — Marburg, Hessen Nassau, Preußen |
| son |
Ludwig der Junker Birth: 1305 33 35 — Marburg an der Lahn, Hessen, Germany Death: February 2, 1345 |
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-2 years son |
Heinrich II. der Eiserne von Hessen Birth: before 1302 30 32 Death: June 3, 1376 |
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8 years daughter |
Elisabeth von Hessen Birth: estimated as close to sibling(s) — about 1309 37 39 Death: after 1354 |