Regular expression for first and last name

Question

For website validation purposes, I need first name and last name validation.

For the first name, it should only contain letters, can be several words with spaces, an

Answer 1

So, with customer we create this crazy regex:

(^$)|(^([^\-!#\$%&\(\)\*,\./:;\?@\[\\\]_\{\|\}¨ˇ“”€\+<=>§°\d\s¤®™©]| )+$)