The Spencer-Nairn baronetcy, of Monimail in the County of Fife, was created in the Baronetage of the United Kingdom on 20 January 1933 for Robert Spencer-Nairn, a Major in the Fife and Forfar Yeomanry. Born Robert Nairn, he was the second son of the 1st Baronet of the Nairn baronets by his wife Emily Frances, daughter of Alfred Rimington Spencer. In 1928 he adopted the additional surname of Spencer.