The shape of a corporeal Patronus is significantly influenced by the personality of the caster. Harry's is a stag; Dumbledore's is a phoenix; Tonks' Patronus, as seen in Harry Potter and the Half-Blood Prince, is "something large and hairy", and has apparently changed recently.
Hermione Jean Granger is a Muggle-born, Gryffindor,who becomes best friends with Harry Potter and Ron Weasley. J.K. Rowling states that she was born on 19 September 1979 and she was nearly twelve when she first attended Hogwarts.
This timeline is reinforced in Harry Potter and the Deathly Hallows when the graves of James and Lily Potter confirm that they were born in 1960 and died on 31 October 1981, further reinforced in Pottermore when the Death Eater riot on the Quidditch World Cup is stated to have taken place in 1994, and further yet in ...
He marries Narcissa Black and together they have one son, Draco, who is the first Malfoy family member introduced in the series. The Malfoys are related to the Black family through Narcissa (a first cousin of Sirius Black, Harry's godfather), which makes Draco a nephew of both Bellatrix Lestrange and Andromeda Tonks.