Cardross House (7)
Following the death of Commendator (or Lay-Abbott) David Erskine in 1611, Cardross appears to have reverted to his cousin John Erskine, 2nd / 23rd Earl of Mar, who had been created 1st Lord Cardross by King James VI when the barony was created.  

(Commendator David Erskine was the 'natural' son of Robert, Master of Erskine, who was killed at the Battle of Pinkie.  Robert's younger brother Thomas, also Master of Erskine, had died in 1551, with no legitimate descendants.  The 3rd brother, John Erskine, 1st / 22nd Earl of Mar and Regent of Scotland, had died in 1572 and was the father of John Erskine, 2nd / 23rd Earl of Mar.)

Following the death of John Erskine, 2nd or 23rd Earl of Mar, 1st Lord Cardross in 1634, the earldom of Mar passed to his eldest son John.  The 2nd son (by a 2nd wife) inherited the earldom of Buchan from his mother - a title that eventually passed to the descendants of the 3rd son, Henry.  Henry Erskine died in 1628, before his father, and his son David, was given the barony of Cardross by his grandfather and hence became 2nd Lord Cardross.
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