For Wallau there are 13 on Yasni with different names.
Among the most common last names on Yasni Wallau is on position 4514.
The word probably comes from "forest-Au", the name of an appropriate site. There are three places I know in Germany, bearing the name "Wallau: Wallau, Hofheim (65 719), Biedenkopf-Wallau (35 216) and the village at Wallau Buchholz / Westerwald (53 567).
(Sent from: Christa Wallau)