Abraham is known as the father of Judaism, but there is no person known as "the leader of Judaism".
In Judaism, if the mother is Jewish, the child is Jewish.
Judaism is called Judaism.
Abraham.
Abraham (אברהם)
Abraham, who is also regarded as a father of Christianity.
Muhammad plays no role in Judaism. At the point he lived, Judaism had existed for almost 2000 years.
They are called "Jews".
Zach Braff's father is Jewish and Zach Braff's mother converted to Judaism before marrying his father. Zach Braff was raised in Conservative Judaism. It is hard to say how practising he is today.
Because He is the father of Judaism
Abraham From the song "Father Abraham"
The father of Judaism, and the first Jew.