Hi! My name is José Cassio Wendhausen.
I´m just a novice in the Onomastic subject, so, excuse my mistakes in the following lines. 
Well, I know that a place named Wendhausen exists in Germany, and also read that this name can have a Wendish orign.
By other side, I read the place Wendhausen was named Wenethusen until 1325, approximately. So, after to seek for information about this place and, puting together what Detlef05 told me, I´m doing a speculation about the meaning of Wendhausen meaning:
1- The norwegian words "wenn et hus en" (Wenethusen), can be translated as "the house of a wenn" or "a wenn´s house".
2- The swedish words "wen ett hus" (Wenethus(-en)), can be translated as "a wen house".
3- Wen, Wenn, Wend are words used when refering to the Wendish.
4- Wend(en)hausen, can be understood as a "house of man from Wenden".
5- Wenden probably has a wendish origin:
https://en.wikipedia.org/wiki/Wends.
https://archive.org/details/originofanglosax00shoruoft Wenden is quoted in page 82.
http://www.wunsch.com.br/wunsch_historia.pdf in page 18. (text in portuguese)
Putting it all together, mine speculation about the wendish orign of Wendhausen surname can be right?
Wendhausen can mean "house of the wend", alluding to a wendish person/people?
In advance, thanks!
