Judaism doesn't have one single messenger. The prophets of the Hebrew Bible (called "the Old Testament" by Christians) could be considered messengers. Rabbinic sages and scholars are not considered messengers.
If you're asking who founded Judaism, tradition is that Judaism was started by Abraham, who rejected idolatry and worshiped the One God.
Moses (Deuteronomy ch.34).
Judaism is called Judaism.
They are called "Jews".
Matty thought Ramon should be called "The Messenger" in Messenger.
Messenger
The genetic messenger is called messenger RNA or mRNA. It carries the genetic information from the DNA in the cell's nucleus to the ribosomes in the cytoplasm where proteins are synthesized.
People who practice Judaism are called Jews.
There are no churches in Judaism.
Followers of Judaism are called Jews.
The people who follow Judaism are called Jews.
Clergy for Judaism are called rabbis.
A member of Judaism is called a Jew or a Jewish person.