Murdoch Stewart's sole surviving male heir was his youngest son, James the Fat, who fled to Ireland after a brief rebellion against the King over the arrest of his father and brothers.
Satu-satunya pewaris laki-laki Murdoch Stewart adalah putra bungsunya, James si Gendut, yang melarikan diri ke Irlandia setelah pemberontakan singkat terhadap Raja atas penangkapan ayahanda dan saudara-saudaranya.