Simplify the following text for a Grade 5 native English-speaking person.
Original: Moses ben-Maimon , called Maimonides and also known as Rambam ( ` '' - Hebrew acronym for `` Rabbi Moshe ben Maimon '' ) , was a preeminent medieval Jewish philosopher and one of the greatest Torah scholars and physicians of the Middle Ages .
Simplified: His Hebrew name was Moses ben Maimon . He is also known as the Rambam , from the intial letters of his title and name , Rabbi Moshe ben Maimon .