In Norse mythology, Njord or Njordr is one of the Vanir (the gods of prosperity and fertility), and is seen as the god of wind, of arable land along the seacoast, and also of various nautical roles (including seamanship, sailing and fishing). He is the husband of Skadi and father of Yngvi-Freyr and Freyja.
The mother of these two gods was, according to the Heimskringla (a mythico-historical text detailing the history of Norwegian kingship), Njord's own sister and lover, as the Vanir apparently had a custom of consanguineous marriage. Intriguingly, his sister's name may also have been Njord, according to the reconstruction of the name of a Teutonic goddess that Tacitus transliterated into Latin as "Nerthus"
Njord, as depicted on the Norwegian stamp from April of 2004. His wife, Skadi, is depicted in the mountain background. See the homepage of the Norwegian Postal Service for more details.
http://www.newworldencyclopedia.org/entry/Njord