Here you can create a new clone, belonging to the serf social status, only if you already have a clone of another, higher social status on your account. Please note, that on your account there cannot be more than 1 clone with the serf status. If you want to create multiple clones - do it consistently, improving the status of your serf to a craftsman, and only after that you may proceed to creating a new serf.
You can name your clone by any unoccupied name. A clone’s name may be comprised of letters (A-Z), numbers (0-9), symbols or a mix of the above. For example, it may begin with a letter, end with a letter or digit, but must consist of no more than 16 characters.