Dame Caroline Sydney Arnott, DBE, LGStJ, JP (née Williams; 22 March 1859 – 28 December 1933) was an English philanthropist.
[3] She married Major Sir John Alexander Arnott, 2nd Bt.
(16 November 1853 – 26 July 1940), son of Sir John Arnott, 1st Bt.
She was invested as a Lady of Grace, Order of St John of Jerusalem (LGStJ).
In 1918, she was invested as a Dame Commander of the Order of the British Empire when she was vice president of the Soldiers and Sailors Help Society, Dublin, for her war work.