Just noticing: why are the names in the KJV changed in NIV?

Already wrote a note on NIV leaving some scripture in the footnotes or leaving verses out all together. Have also noticed in reading the KJV the names are changed when revised into NIV. Why? What's the purpose? Don't say because it's hard to pronounce. What if someone changed your name because it was hard to say? Know that when some immigrate here they shorten their name when they present themselves to you, but they don't change it.