Family: Siemowit Piast of Masovia, IV / Aleksandra Olgierdówna Giedyminowicz von Litauen (F8667)
m. 1387
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 | Siemowit Piast, III (1320-1381) |
 | Eufemia Přemyslovna (1319-1350) |
| Olgierd Giedyminowicz (1296-1377) |
| Julianna Rurykowicz (1325-1391) |
| Siemowit Piast of Masovia, IV (1353-1426)
|
| Aleksandra Olgierdówna Giedyminowicz von Litauen (1360-1434)
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| Cymburgis of Masovia (1394-1429)  |