What does For Pete's Sake mean?

According to the Related Link:
"This phrase and phrases like "for Pete's sake" are euphemisms for the phrases "for the love of God/Christ" or "for God's/Christ's sake" and hail from a time when those phases were considered blasphemous. Nowadays phrases like "for the love of God" are commonly used, but the euphemisms are still used.
Why Pete? Most likely it is a reference to the catholic Saint Peter."

Cus its funneh