Members of a Professional LLC

Hello, I had a question about ownership. In a scenario when not all employees of an LLC are licensed but a business is desired to be setup as a Professional LLC is it possible for this to take place given some employees are not licensed? Is the assumption that all employees are members incorrect? Is the difference between and PLLC and PLLP than just wordplay? What would be the difference between members and partners if not just title? Is there a limit to the number of people to be given the title Partner? or Member?