Adelaide "la Blanche" of Anjou ^{1 2}

   Other names for Adelaide were Adelais of Anjou and Alice of Anjou.

  Research Notes:

She may have had a sister named Blanche.
---
Second wife of William I of Provence. He was her 4th husband.

From Wikipedia - Adelaide of Anjou :

Adelaide[1] (c. 947 -1026 ),[2] called the White,[3] was the daughter of Fulk II of Anjou and Gerberga of Maine . She was therefore the sister of Geoffrey Greymantle . She was married five times to some of France 's most important noblemen.

Her first marriage, probably before 960, was to Stephen, Viscount of Gévaudan . Her second marriage was to Raymond III , Count of Toulouse and Prince of Gothia , in 975. He died in 978.
In 982, she married Louis , the young son of Lothair of France , and the two were jointly crowned Monarchs of Aquitaine on the same day at Brioude . The large difference in age between the spouses was cause for a quick divorce in 984.

She fled then to Arles , where she contracted, against papal advice, a marriage with William I of Provence in 984. She gave him a daughter, Constance of Arles , who later married Robert II of France .
Her final marriage was to Otto-William, Duke of Burgundy .

Notes
^ Variously given as Alice, Adelais, Adalais, or Azalais.
^ Adélaïde Blanche d'Anjou
^ "la Blanche."

Adelaide married William II Count of Arles and Provence, son of Boso II Count of Provence, Avignon & Arles and Constance of Provence, in 984. (William II Count of Arles and Provence was born about 950 and died after 29 Aug 993.)