Bruno Wilhelm Zilliacus (11 November 1877 – 3 July 1926) was an athlete who competed at the 1908 Summer Olympics.

[1] He was also listed as a flag-bearer for Finland at the opening ceremony, although he carried a mere hand-written plaque.

[3] Zilliacus participated in the 30-kilometer cross-country skiing race at the Northern Games in Stockholm 1901, where he did not place in the top 11.

[4] Zilliacus won the first beauty pageant in Finland, held in Helsinki on 8 March 1903.

[3] Born in Saint Petersburg in 1877, his parents were major Alexander Wilhelm Zilliacus and Sofia Vilhelmiina Manninen.