My daughter got the dedication in my first book. It seemed fair, given that I'd used her name for the main character, promising to change it when the book was finished, but I never did. Also, she was (and still is) the only member of my family who showed any signs of interest in my writing. But when the book came out, oh the complaining from my son. Why wasn't he mentioned etc etc.
So dedication No 2 went to him. My partner got No 3. My lovely parents, to whom I owe so much, got No 4 - just in the nick of time as my father died a couple of months after the book was published in hardback. My dear friend Nancy, who reads all my first drafts, and was a terrific personal support a few years back, was a shoo in for No 5. Now I'm on No 6, and it's getting less obvious as to whom I should dedicate the book to. My dear old dog is desperately ill at the moment, so I'm tempted to give it in memoriam of him, but perhaps it would be more tactful to mention my agent, or some of my other friends and family.
Still, think of the problems should you write for younger children. You may have several books out each year, and start to run out of children to dedicate them to so you have to move on to adults. The only book that has ever been dedicated to me is called All Aboard to Work Choo Choo! by Carol Roth and Steve Lavis, and as you might guess from the title I'm not in the target age group.
Worries, worries - it's not all champagne and flowers being a writer you know. How do other writers choose?