Joseph Breuer was born in 1882 in Pápa, Hungary to the local Rabbi Solomon Breuer and Sophie Breuer "née" Hirsch, who was the youngest daughter of Rabbi Samson Raphael Hirsch of Frankfurt am Main, Germany.
Joseph Breuer was born in 1882 in Pápa, Hungary to the local Rabbi Solomon Breuer of the "Austrittsgemeinde" of Orthodox Jews known as Khal Adath Jeshurun. His mother was Sophie Breuer "née" Hirsch, daughter of Rabbi Samson Raphael Hirsch of Frankfurt am Main, Germany.