Exactly: addr:housename is an addition to addr:housenumber. As in "house number 5, also known as Something Court". And therefore it is incorrect in this case. Now there's a bunch of houses like "number 1 (Zephyros 4)", "number 2 (Zephyros 4)" etc. This is clearly the case where addresses are not on street but in the place. The page for addr:place on wiki describes exactly this case. And it makes no sense to add "housename" equal to place name to every building in named place.