Leszek II the Black Piast of Kuyavia, High Duke of Poland, Duke of Kraków, Duke of Sandomierz, was born circa 1241 to Casimir I of Kuyavia (c1212-1267) and Constance of Poland (c1221-1257) and died 1288 of unspecified causes. He married Agrippina of Slavonia (c1248-c1307) . Notable ancestors include Charlemagne (747-814), Alfred the Great (849-899), Hugh Capet (c940-996). Ancestors are from the Czech Republic, Russia, Ukraine, France, the United Kingdom, Belgium, Germany, Italy, the Byzantine Empire, Sweden.

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