Sorry, I don't recognise her, but I can tell you is that if she is a Dutch Warmblood and she was born in 1997, her name couldn't have been Jazz. Her name would have started with a P, since al names of Dutch Warmbloods start with a certain letter (in alphabetical order) corresponding to a year.
For this year al names start with the letter C, so 10 letters back (without Q,X and Y) would be a P.
If her name was really Jazz she should be 16 years old.
Do I see a freezemark on her withers? As far as I know no freezemarks are used or have been used in Holland.