William Herbert, 3rd Marquess of Powis
William Herbert, 3rd Marquess of Powis (1698 – 8 March 1748), styled Viscount Montgomery until 1745, was an English peer. The only son of William Herbert, 2nd Marquess of Powis and his wife Mary, he succeeded his father as Marquess of Powis in 1745. He died three years later, and the Marquessate and its subsidiary titles became extinct. He left his fortune to his heir-male, Lord Herbert of Chirbury; three years later, he married the Marquess' niece, Barbara, who inherited the entailed estates of the family. References

1698 births
1748 deaths
William Herbert, 03rd Marquess of Powis
Dukes in the Jacobite peerage
Marquesses of Powis
Earls of Powis