Dufugan macIndrechtarch
c1090
    1sr Mormaer of Angus     
Gille Brigte macDufugan
c1120
     married
Margaret Gospatric of Dunbar 
        Gille Crist
c1155
       
      married Majorie Huntingdon      
Duncan of Angus
c1170
William (Gilbert) Irvine
c1170
 
Mael Cuim macDonnchadh of Angus
c1190
William de Irvine

    Maud (Matilda) of Angus
c1215
      William Alexander d' Irwyn
c1260
   1st Laird of Drum 
    married Richard Dover
      William Thomas d' Irwyn
c1315
   
            Alexander Irvine
c1360
   
            Robert Alexander Irvine
c1380
   married Elizabeth Keith 
            Agnes Irvine
c1415
 
           
married William Leslie