How many King Louie's (France) were there?

Question

References please, on-line ones if possible. I don't need too many details - just an accurate number with reference(s) will suit my purpose.

Answer 1

Louis XIX was the last King of France (from the Louis) -  http://www.britannia.com/history/resourc...

However there is also Louis XX (http://en.wikipedia.org/wiki/Louis_XX )

Answer 2

18.

Answer 3

See genealogy below.