Siemowit married Alexandra Of LITHUANIA. Alexandra (daughter of Algirdas Of LITHUANIA and Uliana Of TVER) was born after 1350; died on 19 Jun 1434. [Group Sheet] [Family Chart]
Siemowit married ? UNKNOWN. [Group Sheet] [Family Chart]
Algirdas married Uliana Of TVER in 1350. Uliana was born in 1325; died in 1392. [Group Sheet] [Family Chart]