What are the names of William the Conqueror's children?

Answer 1

William I (the Conqueror) had 4 sons and either 5 or 6 daughters :

1. Robert

2. Richard

3. Adeliza (or Alice)

4. Cecilia(or Cecily)

5. William "Rufus"

6. Agatha

7. Constance

8. Adela

9. Henry "Beauclerc"

and possibly Matilda

(see related question)

Answer 2

Robert Curthose married Sybilla of Conversano, the daughter of Geoffrey of Conversano. I could not find much information on her. Robert was William's eldest son, but did not inherit the kingdom because of a combination of personal traits that made people regard him as incompetent. He married in his late 40s.

Richard of Normandy died at 26, unmarried.

Adelle died at age 10 in 1065. Reportedly she had been betrothed to Harold II of England.

Cecilia became a nun and was abbess of Holy Trinity in Caen when she died.

William II Rufus died unmarried at about age about 44. He was king for about 13 years.

Agatha died at age 15 in 1079. She was betrothed to Alphonso VI of Castile.

Constance married Alan IV Fergent, Duke of Brittany, when she was 20 years old. She was later murdered by her servants.

Adela married Stephen of Blois when she was about 22 years old. She was the mother of King Stephen and was renowned for her intelligence and learning.

Henry I Beauclerc married Edith of Scotland, also known as Matilda. They were the parents of Empress Matilda. They were also both highly regarded for their learning. When Edith died, he married Adeliza of Louvain, who was about 19 at the time. They had no children.