Harry Potter and the Sorcerer's/Philosopher's Stone
For Jessica, who loves stories, for Anne, who loved them too, and for Di, who heard this one first.
Jessica is JK's twelve-year-old daughter. Anne was JK's mother, who, unfortunately, died of Multiple Sclerosis on December 30th, 1990. Dianne, or Di, is JK's younger sister who she read Sorcerer's/Philosopher's Stone before Jo sent it off to be reviewed.
Harry Potter and the Chamber of Secrets
For Sean P.F. Harris, getaway driver and foulweather friend.
Harry Potter and Prisoner of Azkaban
To Jill Prewett and Aine Kiely, the godmothers of Swing.
Jill Prewett and Aine Kiely were JK's flatmates when she lived in Portugal. They used to visit a club/restaurant called "Swing" regularly. Because they spent so much time there, Jo called themselves its godmothers.
Harry Potter and the Goblet of Fire
To Peter Rowling, in memory of Mr Ridley and to Susan Sladden, who helped Harry out of his cupboard.
Peter Rowling is JK's father. Mr Ridley refers to Ronald Ridley, an old family friend of the Rowlings. This man's name was the inspiration for Ron Weasley's name. Susan Sladden could be the Susan JK once referred to in an interview as the woman who used to look after Jessica (JK's daughter) while she worked on the Harry Potter books.
Harry Potter and the Order of Phoenix
To Neil, Jessica and David, who make my world magical.
Dr. Neil Murray is Jk's husband. Jessica, her daughter. And David, her son.
Harry Potter and Half-Blood Prince
To Mackenzie, my beautiful daughter, I dedicate her ink and paper twin.
Mackenzie Jean Rowling Murray, JK's third child, was born on January 23rd, 2005. Mackenzie and Book 6 were being "made" (developed/written) around the same time, and were both finished (born/published) almost simultaneously, hence Mackenzie's "ink and paper twin".
Harry Potter and Deathly Hallows
The dedication of this book is split seven ways: to Neil, to Jessica, to David, to Kenzie, to Di, to Anne, and to you, if you have stuck with Harry until the very end.
The "seven-way split" refers to some of those with whom JK has shared her life while writing Harry; Dr. Neil Murray is JK's husband; Jessica, David, and Mackenzie are her children; Di is JK's younger sister, Dianne/Anne is JK's mother who died at 45 of MS (although JK's mother did not know of the books since she died early on, JK has said her death had a profound influence on how the series was written), and the final dedication is to all the fans who have made Harry's journey their own.