While Jesus was on Earth, one thing that he taught people was his father's name.
He told people to call his father Jehovah, that is what Jesus proclaimed.
God's name is seldom used now, I've only seen it in The King James Bible once.
People have neglected to call God by his true name in Jesus's absence.
Jesus knew that knowing God's name is important and that is what he taught.
Jesus was the greatest Human Being who ever lived and I love him a lot.