Origin of "Miranda"

Great Debates
1

Where did the expression “Miranda” come from? (You have the right to remain silent, bla bla bla) My dictionary just says it’s a feminine name.

2

here

3

Here’s the decision by the Supremes.

MIRANDA v. ARIZONA, 384 U.S. 436 (1966)

4

Why is this a debate? Shouldn’t this be in General Questions?