The rabbi Yom Tov Ben Avraham Asevilli (1250 - 1330), also known under the acronym of Ritva (ריטב " א), was a medieval rabbi famous Séfarade as regards Talmud and of Jewish Loi.

Yom Tov Asevilli was born with Seville in Spain in 1250 where he lived until his death in 1330. He was the pupil of the Ra' ah and the Rashba and the professor of the Rabbi Yitzchak Ben Manor.

Its comment of the Talmud is extremely concise and is of this fact one of the comments most often quoted in work talmudic. Many sections of the comment were prone to controversy with regard to their real paternity, but a vast majority of work is remained with the variation of the polemic.