Well, maybe there isn't a word for it. I have one additional example. On my trip to work one possible route goes along a short gravel road name Stonehouse Rd. At one end of Stonehouse Rd. is a stone house. We always refer to it as the eponymous stone house, but, as allisondbl points out, that's not quite the right term. And I have referred to an inning with the same number as the number of runs one team gets in that inning as eponymous, as in, the Red Sox scored five runs in the eponymous fifth inning. I don't think this is a common usage so I wouldn't put it forth as an example. However, I wouldn't be at all surprised if my stone house example was legitimate.