At his death his niece Maria Theresia of Austria - Este became Jacobite claimant .
After the death of his mother in 1840 , Francis was considered the legitimate heir to the thrones of England , Scotland and Ireland by Jacobites as Francis I .
At Francis ' death Francis ' niece Maria Theresia of Austria - Jacobites became Jacobite claimant .
After the death of his mother in 1840 , Francis was considered the legitimate heir to the thrones of England , Scotland and Ireland by Jacobites as Francis I .