The Marquess's eldest son uses Viscount Walden as a courtesy title.

[2] The family seat was Yester House, near Gifford, East Lothian, Scotland.

Charles David Montagu Hay, 14th Marquess of Tweeddale (born 6 August 1947) is the son of the 12th Marquess and his wife Sonia Mary Peake, daughter of Osbert Peake, 1st Viscount Ingleby and Lady Joan Rachel de Vere Capell.

[3] The heir presumptive is the present holder's brother Lord Alistair Hay (b.

1955), whose heir presumptive is his half-brother Lord Andrew Arthur George Hay (b.