Dudley Dursley grew up his whole life being taught not to treat his cousin nicely. His parents, Harry's aunt and uncle, hated Harry because he represented the magical world.
Petunia especially had an issue with him because he reminded her of Lily who Petunia had a very difficult relationship with and was always jealous of.
Dudley was always taught that he was better, that Harry was useless. He never knew anything different. However, after Harry saved his life Dudley changed his mind. He stopped hating Harry and tried to be nice to him.
They remained on Christmas card terms throughout their life.
Because he had 36 and last year he had 37
Vernon Dursley, Petunia Dursley (Lily Potter's sister), and Dudley Dursley.
Dudley Dursley, Vernon Dursley and Petunia Dursley (Petunia Evans).
Harry Potter's cousin is called Dudley Dursley.
kuc
Vernon, Petunia and Dudley
Harry Potter's aunt is called Petunia Dursley and his cousin is called Dudley Dursley. Petunia is his mother's sister.Vernon Dursley (Harry's uncle) also has a sister who Harry is forced to call aunt, her name is Marge Dursley.
Dudley Dursley.
Vernon Dursley, Petunia Dursley (Lily Potter's sister), and Dudley Dursley.
You mean Dursley? Petunia Dursley, often called Tuney by Lily, her sister
Dudley Dursley, Vernon Dursley and Petunia Dursley (Petunia Evans).
Harry lived with Vernon, Petunia, and Dudley Dursley.
He lived with his aunt Petunia Dursley, his uncle Vernon Dursley, and his cousin Dudley Dursley.
Harry Potter's cousin is called Dudley Dursley.
Harry Potter's aunt and uncle are Petunia and Vernon Dursley. Petunia is the sister of Lily, Harry's mother. The Dursley's raised Harry after the death of his parents. They also have a son called Dudley Weasley who is a month older than Harry.
kuc
Rubeus Hagrid gives Dudley a pig tail.
Harry Potter was usually babysat by Arabella Figg on Dudley Dursley's birthday but that day she tripped over her cat and broke her foot so couldn't look after him. As the Dursley's had nobody else to look after Harry - they were forced to take him with them.