Willem Siebenhaar, Dutch-Australian activist (born 1863)

Willem Siebenhaar was a social activist and writer in Western Australia from the 1890s until he left Australia in 1924. His literary contributions and opposition to policies such as conscription were his most notable contributions to the history of the state.

December 29 is the 363rd day of the year in the Gregorian calendar; two days remain until the end of the year.