I was thrilled to find them because I love my black pair that I got in October, and I've been wanting brown too. The brand is Ellen Tracy and they were with the other hosiery and socks. There were also footless fleece tights (same brand), and both were available in black and brown.
Obviously, TJ Maxx's items vary from store to store, but if you're looking for some, it might be worth your while to stop in.