Is Rabban Hebrew or Aramaic?

Mesorah
1

Now if Rabbi is a backformation of Rabban,
What is Rabban?

If Rabban is Hebrew it might mean Our Master

If Rabban is Aramaic‎ it mean mean Our:
A. “Great One”
B. “Exal‎ted One”
‎Etc.

By extension “Rabbi” might follow suit.