יום טוב בן יצחק מיואני

Yom Tov of Joigny, also denoted of York was a French-born rabbi and liturgical poet of the medieval era who lived in York, and died in the massacre of the Jews of York in 1190. A Hebrew language hymn attributed to him, transliterated "Omnam Kayn" or "Omnam Ken" is still recited in Eastern Ashkenazi synagogues each year on the evening of Yom Kippur, the Day of Atonement. He was a student of Rabbeinu Tam.