Yep. Pippa dated JJ Jardine-Paterson for about 3 years, while she was a student at Edinburgh uni. Pippa and JJ broke up a few months before she graduated from uni in 2007.
The Jardine-Patersons are a part of the Jardine family, a fairly old money family. The Jardine-Paterson ancestor Dr. William Jardine was one half of the Jardine-Matheson partnership that created the HUGE Jardine Matheson company in Hong Kong in 1832. Jardine, Matheson & Co. literally developed Hong Kong, and the family is extremely wealthy.
There've been two movies made about the Jardine-Matheson company and the Jardine family: 'Tai-Pan' and Gai-Jin.
Apparently, both Pippa and Emilia d'Erlanger have good taste in men.
Congratulations and best wishes to David and Emilia.
*Trivia: both David J-P and Emilia d'Erlanger attended the roller-disco charity event Kate Middleton helped to host in 2008.