Baron de Blaquiere, of Ardkill in the County of Londonderry, was a title in the Peerage of Ireland. It was created in 1800 for the politician John Blaquiere, 1st Baron de Blaquiere, Chief Secretary for Ireland between 1772 and 1777. He had already been created a Baronet, of Ardkill in the County of Londonderry, in the Baronetage of Ireland in 1784. He was the son of Jean de Blaquiere, a merchant who emigrated to England from France in 1685. Lord de Blaquiere was succeeded by his eldest son, the second Baron. He died unmarried and was succeeded by his younger brother, the third Baron. He was a general in the British Army. His two sons, John the fourth Baron and William Barnard the fifth Baron, both succeeded in the title. The latter was a Captain in the Royal Navy. He was succeeded by his f