Family: Siemowit Piast, III / Eufemia Přemyslovna (F7428)
m. Abt 1336
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 | Siemowit Piast, III (1320-1381) |
 | Eufemia Přemyslovna (1319-1350) |
| Siemowit Piast of Masovia, IV (1353-1426)  |