Colonel Sir Watkin Williams-Wynn, 5th Baronet was a Welsh landowner and Tory politician who sat in the House of Commons from 1794 to 1840.

Sir Watkin Williams-Wynn, 4th Baronet was a Welsh landowner, politician and patron of the arts. The Williams-Wynn baronets had been begun in 1688 by the politician Sir William Williams, 1st Baronet, but had inherited, in the time of the 3rd baronet, Sir Watkin's father, the estates of the Wynn baronets, and changed their name to reflect this.