The SSA tallies most common baby names each year. I've not seen nor read any of the Twilight stories but I understand that Jacob and Isabella are characters in the story/s.
They are also the most popular baby names in the US for 2010. You can sort by state. Waaaay out here in the north-eastern corner of the country we like Owen and Emma.
In my year and state of birth my name was 7th in popularity. My name also comes up on this chart of top 5 names in the last hundred years.
My sons name is popular now, but wasn't so much when he was born. My daughters name is weird and will never make any charts.
How popular is your given name?