George Dawson-Damer, 5th Earl of Portarlington

Lionel George Henry Seymour Dawson-Damer, 5th Earl of Portarlington JP DL (19 August 1858 – 31 August 1900) was a British peer and landowner.

Early life Portarlington was born on 19 August 1858. He was the eldest son of Lionel Dawson-Damer, 4th Earl of Portarlington and Hon. Harriet Lydia Montagu. His younger sister was Hon. Mary Frances Seymour Dawson-Damer (wife of Hon. Algernon Henry Mills, son of the 1st Baron Hillingdon) and his younger brother was Hon. Montagu Francis Beauchamp Seymour Dawson-Damer (who married Margaret Stirling Macleod).

His father was the only son of the Hon. George Dawson-Damer (a younger son of the 1st Earl of Portarlington) and the former Mary Georgiana Emma Seymour (a daughter of Lord Hugh Seymour, fifth son of the 1st Marquess of Hertford).

He was educated at Eton College. He served as a Justice of the Peace for Dorset and Queen's County, as well as Deputy Lieutenant for Dorset.

Masonic fraternity Lord Portarlington was a member of the Masonic fraternity and was appointed a Grand Officer in 1897 by the Prince of Wales (later King Edward VII), as Senior Grand Warden, which was the highest office in Grand Lodge next to the Deputy Grand Master. On 25 October 1881, Viscount Carlow, as he was then known, married Emma Andalusia Frere Kennedy (1861–1929), the only daughter of Catherine Anne May and Lord Nigel Kennedy (a younger son of Archibald Kennedy, Earl of Cassillis, heir apparent to Marquess of Ailsa until his death). Together, they were the parents of: Lady Aline Mary Seymour Dawson-Damer (1884–1953), who married Lt.-Col. Valentine Vivian, son of William Vivian, in 1904. After he was killed in 1915 during World War I, she married Capt. William Frederick Martin, a son of Charles William Wall Martin, in 1919. He was succeeded in his titles by his eldest son, Lionel.

Descendants Through his daughter Lady Aline, he was a grandfather of Celia Marjorie Vivian, who married Sir John Molesworth-St Aubyn, 14th Baronet, eldest son of Sir Hugh Molesworth-St Aubyn, 13th Baronet.

Through his daughter Lady Christian, he was a grandfather of Rosemary Lusia Bowes-Lyon (1915–1989), a first cousin of Queen Elizabeth II who married Edward Wilfred George Joicey-Cecil, youngest son of Col. Lord John Joicey-Cecil, MP for Stamford (a son of the 3rd Marquess of Exeter), in 1945.