The wiki says:
So you're right.
Dragonlance is a shared universe created by Laura and Tracy Hickman, and expanded by Tracy Hickman and Margaret Weis under the direction of TSR, Inc. into a series of popular fantasy novels. The Hickmans devised the concept that became Dragonlance while driving in their car on the way to TSR for a job application. At TSR, Tracy met his future writing partner Margaret Weis, and they gathered a group of associates to play the Dungeons & Dragons role-playing game. The adventures during that game inspired a series of gaming modules, and a series of novels, as well as licensed products such as board games, and lead miniature figures.
So you're right.