William Otto Brunner

For the United States Representative, see William F. Brunner.
For the Austrian historian, see Otto Brunner.

William Otto Brunner (7 July 1878 – 1 December 1958) was a Swiss astronomer.

From 1926 until 1945 he was the director of the Swiss Federal Observatory. He continued the series of Zürich sunspot observations that was begun by Rudolf Wolf, succeeding the previous director, Alfred Wolfer. These observations continue up to the present, at the Royal Observatory of Belgium.

The crater Brunner on the Moon is named after him.

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