The Collaborative International Dictionary of English v.0.48:

Pyrenean \Pyr`e*ne"an\, a. [L. Pyrenaei (sc. montes) the
   Pyrenees, fr. Pyrene, Gr.? a daughter of Bebryx, beloved by
   Hercules, and buried upon these mountains.]
   Of or pertaining to the Pyrenees, a range of mountains
   separating France and Spain. -- n. The Pyrenees. --Shak.
   [1913 Webster]