The eldest son of the Duke uses the courtesy title Earl of March and Kinrara .
Finally , the title Earl of Kinrara was created in the peerage of the United Kingdom with the Dukedom of Gordon .
The eldest son of the Duke uses the courtesy title Earl of March and Earl of Kinrara .
Finally , the title Earl of Kinrara was created in the peerage of the United Kingdom with the Dukedom of Gordon .