Nielsen Hayden genealogy
Family: Boleslaw II of Masovia / Gaudimanté of Lithuania (F17325)
m. 1279Siemowit I of Masovia (1228-1262) 
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Pereslajawa Danilovna of Halicz ( -1283)
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| Traidenis of Lithuania (1240-1282) |
| Boleslaw II of Masovia (1251-1313)
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| Gaudimanté of Lithuania ( -1288)
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Trojden I of Masovia (1284-1341)  |