Yehudah Yudl Rosenberg was born to a Jewish family in Skaraschev, near Radomsko, Poland.
At age 17, he married Chaya Chava, the daughter of a famous rabbinical family.
He became a rabbi himself, and in 1913, moved with his family to Toronto, Canada
to lead Beth Jacob Congregation, founded by a group of Polish-born Jews. During his nearly six years in the city, Rabbi Rosenberg founded several Jewish schools. In 1919, he moved to Montreal to become the Chief Rabbi of the United Hebrew Orthodox Congregations, a group of synagogues serving mostly immigrant Ashkenazi communities.
He began publishing his writing while still in Poland, and his works ranged from educational texts such as Sefer ha-Berit, an anthology of scientific knowledge for Jews unfamiliar with European languages, to a Hebrew translation from the original Aramaic of the Zohar, and additional commentaries on it.
He is perhaps most famous for his popular 1909 stories about the Golem of Prague, first published in Hebrew, and known in English since the 2007 translation by Curt Leviant as The Golem and the Wondrous Deeds of the Maharal of Prague. Rabbi Rosenberg was the grandfather of novelist Mordecai Richler.