The Collaborative International Dictionary of English v.0.48:

Well-bred \Well"-bred`\, a.
   Having good breeding; refined in manners; polite; cultivated.
   [1913 Webster]

         I am as well-bred as the earl's granddaughter.
                                                  --Thackera?.
   [1913 Webster]
   [1913 Webster]

WordNet (r) 3.0 (2006):

well-bred
    adj 1: of good upbringing [syn: well-bred, well-mannered]

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "well-bred":
   blue-blooded, cultivated, cultured, full-blooded, genteel, gentle,
   gentlemanlike, gentlemanly, highborn, highbred, ladylike,
   of good breed, polished, pur sang, pure-blooded, purebred, refined,
   thoroughbred, well-brought-up, wellborn