"his cousin Abdur Rahman"

Abdur Rahman Khan
Public DomainAbdur Rahman Khan - Credit: Sherurcij
Abdur Rahman was Amir of Afghanistan from 1880 to 1901.  He was a strong ruler, something which was very much needed in the years following the Second Anglo-Afghan War.  He died on 1st October 1901 and was succeeded by his son Habibullah Khan.