[1] Shemos 13:8

[2] R’ Saadia Gaon said that he belonged to the noble family of Sheilah, son of Yehuda. He called his son Dosa, after his ancestor R’ Chanina Ben Dosa.

[3] The Avadim Hayinu section was written in the second century by R’ Eliezer Hagadol. The section of the Haggadah which speaks of the four rabbis who stayed awake all night in Bnei Brak discussing the Exodus from Egypt is cited in the works of the Tosafos (eleventh century).

[4] R’ Vitri, who died in 1105, was a student of Rashi.

[5] The first known printed Haggadah as we have it today was made in 1485 in Venice, Italy.

[6] He was the first to arrange a complete liturgy for Shul—Siddur Rav Amram.

[7] This was authored by R’ Yosef Tur-Elam I, who died in 1040.

[8] This was authored by R’ Yannai, the ninth century Rebbi of R’ Eliezer Hakalir. A later custom reported by Maharil (circa. 1365-1427) adds the words: ויהי בחצי הלילה before the words אז רוב נסים.

[9] The author is unknown but cited by Eitz Chaim, Rabbi Yaakov bar Yehuda of London (circa. 1285)

[10] The earliest known inclusion of Chad Gadya—of whom we don’t know the author—is in Sefer Rokeach (1160-1238). Hundreds of explanations have been written on it. The Chida (1724-1806) writes that the Vilna Gaon (1720-1797) wrote more than ten different explanations!