(of a person) attractive in a complete way (in both appearance and personality)
Not only was he intelligent, but he was also very personable -- and whether we like it or not, the first is not worth nearly as much on it own as it is when accompanied by the second.
persona (human being, person) (Latin)
affable, amiable, personable
per often means to complete or completely. and sona in punjabi means attractive and beautiful. hence completely attractive. it can be person+able i.e. a person who has the ability (able) to do things should be attractive.