Why they have so many names?

[BuccaneerBrazil]

Why so many actresses have several names and nicknames?
It's good for their career?

[Hitman]

Its because they work for many different production companies, Some times producers use a different name for them so they don't use a name used by another producer, perhaps due to copyright issues or something along those lines. Its not always the models choice. But there are times when models will use a different name until they settle on a name they like.
There are several reasons that different alaises are used. It seems to be an ongoing thing in the biz. But there are some performers using fewer names now adays.

[mark shanon]

Probably also because is the easiest way to sell the same thing many times.