Gunnar Brynolf Wennerberg (1866-1950) was born in Sweden, but made a successful career elsewhere, mostly in Germany. His Wikipedia entries are only in Swedish and German as of the time this post was drafted. You probably can have your computer translate from either language. However, differences in syntax with English make for difficult reading in places -- though you ought to grasp most of the meaning.

Wennerberg was skilled at drawing and painting smiling women. Moreover, most of the images I've found on the Web have highly natural-looking subjects. This is even though female makeup and grooming fashions, particularly in the 1920s and 30s, required some other illustrators' results to seem odd to us.

Beyond his ability to portray, Wennerberg had a very nice painterly style.

Gallery

[Image]Beim Ankleiden - Käthe Berger

[Image]Costume ball scene?
Wennerberg illustrated a lot of carnival and costume ball scenes.

[Image]Der Charmeur
This might be a magazine illustration from around 1910.

[Image]Faun
A very nicely painted sketch with just enough detail to sell the scene.

[Image]In Erwartung
She is waiting, but for whom or what, I can't say.

[Image]Carnival

[Image]Morgengabe - c. 1920

[Image]Simplicissimus cover
I don't have the date for this, but between 1910 and 1915 shouldn't be far off.

[Image]Dancer

[Image]Dancer

[Image]Dancer
Three paintings, each featuring a Tänzerin.

[Image]Clothilde Eggerer - 1939
For once, a woman who is not smiling. Because of the war?

[Image]Spritzig - c. 1930

[Image]Portrait sketch - 1935
I think this is especially well done.  The guy could really paint.