Our daughter, Shiloh, was born in 1994. While she was very young, Shiloh was the name of a 17 yo-ish Miss (Zion, IL?) at a parade that we attended. (She would have been so named around 1980-ish.) Those two examples predate the 1996 film about the beagle, with the earlier predating the book series, as well. We were completely unaware of the books when we chose it for our daughter. (I think it is more common to give animals "people" names, than it is the other way around.)Jolie & Pitt only brought this name into the spotlight.Neil Diamond's "Shilo" (1970) may have been a stronger influence for those who didn't take it from the Bible.To those who are stuck on |-o| as a masculine ending, Margo & Marlo are two feminine examples that end in said |-o|.
This word is a title (like Messiah, King) and not a name to Jewish people. It is a blaspheme to use it for your child, since it is like claiming for him the descendency from King David and the election by G-d to be the Mashiach (Messiah).
More than 99.9 percent of people with the first name Shiloh are female.