Baylee's name

If you ask Baylee what her name is these days she will say....Baylee Bug. Why does she call herself this, because I call her Baylee Bug all the time. The first time I heard her say it. She was telling someone her name when they were introducing themselves. I told her no that is not your real name we just like to call you that. Then I told her what it is and she says, no!, it's Baylee Bug. It's funny to hear her say it, and she is so serious, and adamant about it.