Zoe Zaoutzaina

Zoe Zaoutzaina (died May 899) was the second wife of the Byzantine emperor Leo VI the Wise. She was the daughter of Stylianos Zaoutzes, a high-ranking bureaucrat during the reign of her husband.

http://en.wikipedia.org/wiki/Zoe_Zaoutzaina

http://en.wikipedia.org/wiki/Leo_VI_the_Wise#Family

By his second wife, Zoe Zaoutzaina, Leo had one daughter:

Anna,[35] whom it is believed to have married the Holy Roman Emperor Louis the Blind.[43]

 35.) Norwich, pg. 113

43.) Reuter, Timothy, The New Cambridge Medieval History, Vol. III: c. 900-c. 1024, Cambridge University Press, (2000), pg. 334