I think so. It depends on whether it was an original design or not, and if you're going to sell it. I'd be a little upset if I was, say, at a craft show, and someone across the aisle liked once of my quilts that I'd designed, and was then selling it at the next show.
That said, most quilting patterns are public domain these days. And if you're using your own stash, is it really even the same quilt? I mean, blending and arrangement take work!
Glad you found a pattern you like so much!