The title became extinct on the death of the sixth Baronet in 1748.
Later that year he was raised to the Peerage of Scotland as Lord Napier.
The baronetcy was successfully claimed in 1817 by the third Lord Napier's heir male general, the eighth Baronet.
The Napier Baronetcy, of Merrion Square in the County of Dublin, was created in the Baronetage of the United Kingdom on 9 April 1867 for the Conservative politician and former Lord Chancellor of Ireland Joseph Napier.
The heir apparent is the present holder's only son Hugh Robert Lennox Napier of Merchistoun, Younger of Napier (born 1977).