http://www.answers.com/topic/valkyrie
 
 
http://www.valkyrietower.com/odin.htm
 
 
http://www.cdli.ca/CITE/v_valkyries.htm
 
Here are three sites some opinions are for and some are against these  Girls being Odin's daughters, there are other sites to look upon , but it seems according to some, they do not ride horses but Wolves.
I have to admit that not one of my books provides a link to this, I have accordingly believed in  a myth for some time, but it is a very pleasing one
Blessings
Patricia