List of rulers of Provence
Bosonid dynasty

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Name
Born
Reign
Consort
Death
Notes
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William I the Liberator
c.950 Son of Boson II of Arles and Constance of Vienne
961-975
Arsenda of Comminges no children Adelaide-Blanche of Anjou c.984 four children
After 29 August 993
First counts of Provence and brothers, ruled together until 975, when William took the margravial title. and Rotbold took the same title in 993, after William abdication.
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William I the Liberator
c.950 Son of Boson II of Arles and Constance of Vienne
975-993
Arsenda of Comminges no children Adelaide-Blanche of Anjou c.984 four children
After 29 August 993
First counts of Provence and brothers, ruled together until 975, when William took the margravial title. and Rotbold took the same title in 993, after William abdication.
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Rotbold I
Son of Boson II of Arles and Constance of Vienne
961-993
Emilde two children
1008
First counts of Provence and brothers, ruled together until 975, when William took the margravial title. and Rotbold took the same title in 993, after William abdication.
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Rotbold I
Son of Boson II of Arles and Constance of Vienne
993-1008
Emilde two children
1008
First counts of Provence and brothers, ruled together until 975, when William took the margravial title. and Rotbold took the same title in 993, after William abdication.
Regency of Adelaide-Blanche of Anjou:993-999
Regency of Adelaide-Blanche of Anjou:993-999
Regency of Adelaide-Blanche of Anjou:993-999
Regency of Adelaide-Blanche of Anjou:993-999
Regency of Adelaide-Blanche of Anjou:993-999
Regency of Adelaide-Blanche of Anjou:993-999
Regency of Adelaide-Blanche of Anjou:993-999
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William II the Pious
c.980 Son of William I and Adelaide-Blanche of Anjou
999-1019
Gerberga of Burgundy c.984 four children
4 March 1019
Fell under control of his uncle Rotbold until his death in 1008.
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Rotbold II
c.980 Son of Rotbold I and Emilde
1008-1014
Ermengarde of Burgundy before 1002 three children
1014
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William III
Son of Rotbold II and Ermengarde of Burgundy
1014-1037
Lucie before 1002 three children
1037
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William IV
c.980 Son of William II and Gerberga of Burgundy
1019-1030
Unmarried
1030
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Fulk Bertrand
c.1000 Son of William II and Gerberga of Burgundy
1030-1051
Hildegard two children
27 April 1051
Brothers, ruled jointly after their elder brother's death.
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Geoffrey I
c.1000 Son of William II and Gerberga of Burgundy
1030-1062
Etienette four children
February 1062
Brothers, ruled jointly after their elder brother's death.
After William III's death with no descendants, the line of counts became the sovereign line in Provence, but not uncontested. In fact, through Emma of Provence, who inherited her brother William III's margravial title, her descedants, the counts of Toulouse, claimed Provence for themselves using the title Margrave of Provence, in spite of never having ruled there.
After William III's death with no descendants, the line of counts became the sovereign line in Provence, but not uncontested. In fact, through Emma of Provence, who inherited her brother William III's margravial title, her descedants, the counts of Toulouse, claimed Provence for themselves using the title Margrave of Provence, in spite of never having ruled there.
After William III's death with no descendants, the line of counts became the sovereign line in Provence, but not uncontested. In fact, through Emma of Provence, who inherited her brother William III's margravial title, her descedants, the counts of Toulouse, claimed Provence for themselves using the title Margrave of Provence, in spite of never having ruled there.
After William III's death with no descendants, the line of counts became the sovereign line in Provence, but not uncontested. In fact, through Emma of Provence, who inherited her brother William III's margravial title, her descedants, the counts of Toulouse, claimed Provence for themselves using the title Margrave of Provence, in spite of never having ruled there.
After William III's death with no descendants, the line of counts became the sovereign line in Provence, but not uncontested. In fact, through Emma of Provence, who inherited her brother William III's margravial title, her descedants, the counts of Toulouse, claimed Provence for themselves using the title Margrave of Provence, in spite of never having ruled there.
After William III's death with no descendants, the line of counts became the sovereign line in Provence, but not uncontested. In fact, through Emma of Provence, who inherited her brother William III's margravial title, her descedants, the counts of Toulouse, claimed Provence for themselves using the title Margrave of Provence, in spite of never having ruled there.
After William III's death with no descendants, the line of counts became the sovereign line in Provence, but not uncontested. In fact, through Emma of Provence, who inherited her brother William III's margravial title, her descedants, the counts of Toulouse, claimed Provence for themselves using the title Margrave of Provence, in spite of never having ruled there.
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William Bertrand I
c.1040 Son of William II and Hildegard
1062-1094
Theresa of Aragon no children Adelaide of Cavenez one child
28 July 1094
Co-ruled as brothers and cousins.
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Geoffrey II
c.1040 Son of William II and Hildegard
1062-1067
Ermengard no children
28 July 1094
Co-ruled as brothers and cousins.
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William Bertrand II
c.1050 Son of Geoffrey I and Etienette
1063-1093
Matilda one child
28 July 1094
Co-ruled as brothers and cousins.
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Gerberga
1045/65 Daughter of Geoffrey I and Etienette
1094-1112
Gilbert I of Gévaudan 1073 two children
28 July 1094
Considered a wise ruler. She abdicated in 1112 to her eldest daughter, soon after her marriage to the count of Barcelona.

Question: William Bertrand died on on what date, and his son died by the name of what died on what date?
Answer: William Bertrand I and his son, William Bertrand II, both died on 28 July 1094.