Heinrich I. von Brandenburg, Markgraf von Brandenburg, Markgraf von Landsberg, was born 1260 to Johann I. von Brandenburg (c1213-1266) and Jutta von Sachsen (c1228-1287) and died 14 February 1318 of unspecified causes. He married Agnes von Wittelsbach (c1272-1345) 1298 JL .
Children
| Name | Birth | Death | Joined with |
| Sophie von Brandenburg (1300-1356) | 1300 | 1356 | Magnus I. der Fromme von Braunschweig-Wolfenbüttel (c1304-1369) |
| Margaretha von Brandenburg (c1301-1347) | |||
| Jutta von Brandenburg (c1306-c1325) | 1306 | 1325 | Heinrich II. von Braunschweig-Grubenhagen (c1289-1351) |
| Heinrich II. von Brandenburg (c1308-1320) | 1308 | July 1320 Mieszkowice, Poland | |
Footnotes (including sources)
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