Source : Webster's Revised Unabridged Dictionary (1913)

Blenheim spaniel \Blen"heim span"iel\ [So called from Blenheim
   House, the seat of the duke of Marlborough, in England.]
   A small variety of spaniel, kept as a pet.

Source : WordNet®

Blenheim spaniel
     n : red-and-white variety of English toy spaniel