Jacob Roll Knagenhjelm (1858 – 1932) was the Lord Chamberlain of King Haakon VII of Norway from 1925 to 1931 and a member of the Norwegian nobility.
He was born in Trondhjem[1] as the son of Ludvig Wiese Knagenhjelm (1824–1907) and Selma Angelique Lousie Roll.
[3] The Knagenhjelm family had resided in Sogndal in recent times, and had been ennobled in 1721, then under the name Knagenhielm.
He moved to the Ministry of Agriculture in 1900, and also became a chamberlain in the royal court of Oscar II.
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