Yes. She's the daughter of Han and Leia, she has a twin brother named Jacen and a younger brother named Anakin. Jacen and Jaina were born five years after the Battle of Endor (9.5 BBY) and Anakin was born a year and a half after that (11 BBY).
I bet if she was designed/described like this in the Jedi Academy books, that series would've been more successful and practically flown off the shelves of bookstores --- "I love comic books and I love anime. Its kind of like being in a crack house with no money.- Samuel L. Jackson