Joan or Jean Anacker? Help! Need Info on this artist.

I basically would like any information about this artist. I was wondering if I may aquire some information from you. I could sure use some expertise on a painting, A VERY OLD PAINTING. I do not have the painting on hand, however, will soon. Here is what I know about the painting...

The painting was purchased in 1930 for $1000+. The artists last name is ANACKER. The first name is possibly Joan, John, Jean, or Tean. Most likely Joan. Something to that nature. It is an oil painting of a lake, sky, mountain valley, ect. The size is approx 3ft x 3ft. The frame is a wood on gold frame with glass. Possibly purchased in Pittsburgh, PA. The person that purchased it traveled very much.

Thats all I know, so far. I will be seeing the painting soon. Anything you could tell me would be appreciated. Even links to web sites, ect. Thank you for anything that you could do. Email your response to [email protected]