List the names of the people mentioned in the text provided.

Context: John Wycliffe questioned the privileged status of the clergy which had bolstered their powerful role in England and the luxury and pomp of local parishes and their ceremonies. He was accordingly characterised as the "evening star" of scholasticism and as the morning star or stella matutina of the English Reformation. In 1374, Catherine of Siena began travelling with her followers throughout northern and central Italy advocating reform of the clergy and advising people that repentance and renewal could be done through "the total love for God." She carried on a long correspondence with Pope Gregory XI, asking him to reform the clergy and the administration of the Papal States. The oldest Protestant churches, such as the Moravian Church, date their origins to Jan Hus in the early 15th century. As it was led by a Bohemian noble majority, and recognised, for some time, by the Basel Compacts, the Hussite Reformation was Europe's first "Magisterial Reformation" because the ruling magistrates supported it, unlike the "Radical Reformation", which the state did not support.

Answer: The people mentioned in the text include John Wycliffe, Catherine of Siena, Pope Gregory XI, and Jan Hus (or 'John Huss' as it is typically spelled by English speakers).