User blog comment:MeDeoPal/On the Origin of Titans and Shifters/@comment-114.125.41.118-20141204165214/@comment-69.196.131.240-20141218004912

The thing about it though, is that the walls were made a thousand years ago. There's no evidence that it suggests that the Reiss family has a tie-in, since the walls are in fact made of Titans.