Question: When did Henryk Ix Starszy's father die?
Sentence (from "Henryk IX Starszy"): (b. probably between 1387 and 1392, d 11 November 1467 in Krosno) was a Duke of Żagań-Głogów during 1397–1412 (as co-ruler of his brother), during 1412–17 ruler over Szprotawa, Krosno Odrzańskie, Świebodzin and half of Głogów (with his brothers as co-rulers), since 1417 ruler over Szprotawa, half of Głogów, since 1420 ruler over Kożuchów and Zielona Góra, from 1430 ruler over Krosno Odrzańskie and Świebodzin and since 1446 Duke of Lubin.
Relevant evidence: No