Notes from http://stirnet.com/html/genie/british/ff/fife1.htm#linklo
Orm de Abernethy (a 1172/3) .. Orm, son of Hugh, is identified in TSP(Saltoun), and also 'Fife: Pictorial and Historical', as ancestor of the Abernethy family. BP1999 (Saltoun) identifies that Hugh as son of Gillemichael, 3rd Earl of Fife. That claim was not made for BP1934 (Saltoun) so it is assumed that some additional evidence has been found to justify that identification.