Cecil Marcus Knatchbull-Hugessen, 4th Baron Brabourne (27 November 1863 – 15 February 1933) was an English cricketer, and later a British peer.
Born in Lowndes Square, Chelsea, London, Knatchbull-Hugessen was the fourth child and second son of Edward Knatchbull-Hugessen, 1st Baron Brabourne and his first wife, Anna Maria Elizabeth Southwell.
He was educated at Eton College and King's College, Cambridge, and appeared in the cricket eleven at both. A right-handed batsman and wicket-keeper, he also made appearances for Kent County Cricket Club. In total he scored 192 runs in 12 appearances, and took ten catches and one stumping keeping wicket.
Knatchbull-Hugessen succeeded to the title Baron Brabourne in 1915, following the death of his nephew Wyndham Knatchbull-Hugessen. Knatchbull-Hugessen also inherited the Knatchbull Baronetcy, of Mersham Hatch, after the death of an other cousin, Sir Wyndham Knatchbull, 12th Baronet, in 1917.
Knatchbull-Hugessen died whilst journeying from Cape Town to London aboard the SS Caernarvon Castle in February 1933.