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

For simplicities sake, you can use:

(.*)\s(.*)

The thing I like about this is that the last name is always after the first name, so if you're going to enter this matched groups into a database, and the name is John M. Smith, the 1st group will be John M., and the 2nd group will be Smith.