During this period he was a brother-in-law of Rasmus Meyer and Gustav Guldberg, who were married to two of Anne's sisters.

The second marriage with Ragna Margrethe Knudsen lasted from September 1911 to her death in July 1917, and finally he married Swedish-born school teacher Ester Victoria Svensson in October 1918.

The collections of natural history items were located at the university campus in downtown Kristiania, but this locality had become too small.

[1] Together with Waldemar Christofer Brøgger, Wille was instrumental in moving the natural history collections to new localities at Tøyen.

[1] Wille was also involved in politics, serving as the Conservative Party chairman of the local chapter in Grünerløkken from 1911 to 1913.