 William Maitland son of Christian Makgill, daughter of the second viscount then claimed the viscountcy but this was challenged in 1734 by James Makgill of Nether-Rankeillor who was sixth in descent from Lord Rankeillor.The House of Lords refused to accept the claim of either James Makgill or Christian Makgill's son, William Maitland.As a result, the title became dormant although Christian's younger sister, Henrietta, later assumed the title of Viscountess of Oxfuird but without establishing the legal right to the title and she died in 1758 without issue.