Rabbi Yitzchak Chayot, son of the great Rabbi Avraham, whose name went forth throughout all the dispersions of Israel. He spread Torah and composed Sefer Pachad Yitzchak [on the aggadot of Chapter HaNizkin and other aggadot, printed 5332], and Siach Yitzchak [which is a song for the night of Pesach and the laws of Pesach 5348], and Penei Yitzchak [which is the laws of the 15th in verses 5351]. And Kiryat Arba and other compositions.

He was head of the rabbinical court in Prague in the year 5344 (Tzemach David), and his son Rabbi Avraham composed Sefer Holech Tamim on the reasons for the commandments, printed 5394.

That year, which was 5344, fire fell from the heavens in the province of Ofteland, and there was a great earthquake and the earth trembled for three days and three nights. Many buildings fell, and a great mountain called Mount Yohanno moved and shook from its place and fell into the valley upon 172 houses and became graves for the people inside them (Tzemach David, part 2).