‘Evronot Manuscript (Rules for Calculation of the Calendar)

Asher bar Shmuel Ha-Cohen was a scribe active in Germany in the early seventeenth century.

Leyb ben Samuel Oppenheim (also known as Loewe Oppenheim) was a scholar who lived in Worms, Germany, and was the author of several Sifre ‘evronot (Books of Intercalation) in the sixteenth century. He is known particularly for his guidance on how to reconcile the Christian calendar with the Jewish calendar.