Frederuna - Confused - Are these profiles one in the same???

Frederuna MP
Birth: circa 930
Death: 1015 (81-89)
Zörbig, Sachsen-Anhalt, Germany
Immediate Family:
Daughter of Count Volkmar of Harzgau, I
Wife of Wichmann I Billung, Graf im Bardengau Graf im Wigmodien and Count Bruno I. von Arneburg (von Querfurt), Graf von Arneburg

Volkmar von Harzgau, Graf von Harzgau
Gender: Male
Birth: circa 890
Harzgau, Germany
Death: circa 961 (63-79)
Harzgau, Germany
Immediate Family:
Son of Frederick II von Harzgau, Graf im Harzgau
Father of Frederuna

Frederick II von Harzgau, Graf im Harzgau Immediate Family:
Son ofFriedrich I von Harzgau, Graf im Harzgau
Father of Count Volkmar of Harzgau, I

Frederuna von Ringelheim MP
Latin: Frederunam
Gender: Female
Birth: 885
Goslar, Lower Saxony, Germany
Death: February 10, 917 (32)
Burg Zörbig
Place of Burial: Basilique Saint-Remi, Reims, Marne, Champagne-Ardenne, France
Immediate Family:
Daughter of Volkmar de Harzgau
Wife of Charles Iii "the Simple", king of The Franks

Volkmar von Harzgau, Graf von Harzgau
Gender: Male
Birth: estimated between 860 and 882
Immediate Family:
Son of Frederick II von Harzgau, Graf im Harzgau
Father of Bovo II., Bishop of Charlons-sur-Marne and Frederuna

Frederick II von Harzgau, Graf im Harzgau
Gender: Male
Birth: 855
Death: circa 945 (86-94)
Immediate Family:
Son of https://www.geni.com/people/Friedrich-I-Bia-De-Harzgau-Comte-De-Har... and Comtesse de Harzgau Bia De Harzgau