That's common but sometimes the cause is not what you would think.

In Spain there are many people with foreign or uncommon names... that are also biblical names. Abraham, Sarah, Aaron, Jonathan or Josuah (Josué) were unheard half a century ago. Now they're usual.

Why? In part, because Evangelical missionaries were more successful in poor quarters, specially among gypsies.

Also there's the famous actors thing. But now Vanessa also sounds natural enough.