Lieutenant-Colonel Frederick Rossmore Wauchope Eveleigh-de-Moleyns, 5th Baron Ventry, DSO DL (11 December 1861 – 23 September 1923), was a British Army officer and Anglo-Irish peer.

He was educated at Harrow School and the Royal Military College, Sandhurst.

[1] On 1 October 1896, he was redirected from the Matabele Campaign with Robert Baden-Powell to create the new police force in Mashonaland.

He served as Deputy Lieutenant of County Kerry in the year 1902 during his residence in Burnham House, Dingle.

Shelmerdene, provisions for John Gilbert de Moleyns, annuity to Edward Dayrolles, and the remainder to his brother Arthur William de Moleyns, the 6th Baron Ventry.