Question: Who is the first cousin of James Edward Lascelles' father?

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Mark Dent-Brocklehurst: Geoffrey Mark Dent-Brocklehurst (25 April 1932 – September 1972) was a stockbroker and the heir to Sudeley Castle.  He was the son of Major John Henry Dent-Brocklehurst and his wife Mary (née Morrison).  Via his paternal grandmother, Marion Lascelles, he is a descendant of Henry Lascelles, 3rd Earl of Harewood.  Thus he was a third cousin of George Lascelles, 7th Earl of Harewood.  Michael Hicks Beach, 2nd Earl St Aldwyn, whose mother was Marjorie Brocklehurst, was his first cousin.

Edward Fleming: Edward Lascelles Fleming ("c." 1891 – 17 February 1950) was a Conservative Party politician in the United Kingdom.

Arthur Child: Arthur James Edward Child, {'1': ", '2': ", '3': ", '4': "} (May 19, 1910 – July 30, 1996) was a Canadian businessman and former chairman and chief executive officer of Burns Foods Limited of Calgary.  Arthur James Edward Child and his business partner Ron Jackson acquired the food processing and distribution company in a leveraged management buyout in 1986.  With sales in excess of $1 billion, Burns Foods was involved in meat processing, dairy, food warehousing and distribution, and vegetable processing businesses.  Over a 12-year period, Arthur James Edward Child and his management team built Burns Foods into a leading Canadian food company with over $1 billion in annual sales.  Beginning in 1995, a majority of the Burns Foods’ subsidiaries were sold generating an exceptional return to the shareholders.

Patricia Lascelles, Countess of Harewood: Patricia Elizabeth Lascelles, Dowager Countess of Harewood (née Tuckwell, born 24 November 1926), is an Australian violinist and former fashion model.  She is the widow of George Lascelles, 7th Earl of Harewood, eldest paternal first cousin of Queen Elizabeth II.

David Lascelles, 8th Earl of Harewood: David Henry George Lascelles, 8th Earl of Harewood (born 21 October 1950), is a British hereditary peer and film and television producer.  He is the first cousin, once removed of Queen Elizabeth II, the great-grandson of King George V and is 57th in line to the British throne.  From his birth in 1950 until he succeeded his father in July 2011, he was known by the courtesy title Viscount Lascelles.

James Lascelles: James Edward Lascelles (born 5 October 1953), styled The Hon. James Lascelles, is a British musician and the second son of the 7th Earl of Harewood and his first wife, the former Marion Stein (subsequently Mrs. Jeremy Thorpe).  His father was a first cousin to Queen Elizabeth II, making Lascelles a first cousin, once removed, of Queen Elizabeth II and in line of succession to the British throne.

Brisco baronets: The Brisco Baronetcy, of Crofton Place in the County of Cumberland, is a title in the Baronetage of Great Britain.  It was created on 11 July 1782 for John Brisco, with remainder, failing male issue of his own, to his brother Horton and the heirs male of his body.  Brisco had earlier served as Sheriff of Cumberland.  The title descended from father to son until the death of his great-great-grandson, the fifth Baronet, in 1922.  The late Baronet was succeeded by his first cousin, the sixth Baronet.  He died childless and was succeeded by his first cousin, the seventh Baronet.  This line of the family failed on the death of the latter's son, the eighth Baronet, in 1995.  The late Baronet is believed to have been succeeded by his first cousin, the presumed ninth and (as of 2007) present holder of the title who lives in Southland, New Zealand.  Campbell Howard Brisco is the son of Gilfrid Rimington Brisco, younger brother of the seventh Baronet.  However, he has not successfully proven his succession to the baronetcy and is therefore not on the Official Roll of the Baronetage, with the baronetcy considered dormant.  For more information, follow this link.

Gerald David Lascelles: Gerald David Lascelles (21 August 1924 – 27 February 1998) was the younger son of Henry Lascelles, 6th Earl of Harewood and Mary, Princess Royal, the only daughter of King George V of the United Kingdom and Mary of Teck.  He was the first cousin of Queen Elizabeth II.  He was styled "The Honourable" Gerald Lascelles.  He and his first cousin, Princess Margaret, Countess of Snowdon, shared the same birthday.

George Lascelles, 7th Earl of Harewood: George Henry Hubert Lascelles, 7th Earl of Harewood, {'1': ", '2': ", '3': ", '4': "} (7 February 1923 – 11 July 2011), styled The Hon. George Lascelles before 1929 and Viscount Lascelles between 1929 and 1947, was the elder son of the 6th Earl of Harewood and Princess Mary, Princess Royal, the only daughter of King George V and Queen Mary.  At his birth, he was 6th in the line of succession.  Lord Harewood was the eldest nephew of King George VI and was a first cousin of Queen Elizabeth II.  He succeeded to his father's earldom on 24 May 1947.

Edward Lascelles, 1st Earl of Harewood: Edward Lascelles, 1st Earl of Harewood (7 January 1740 – 3 April 1820) was a British peer and Member of Parliament.

Supporting paragraphs: James Lascelles George Lascelles, 7th Earl of Harewood
Answer: Queen Elizabeth II