People William Willoughby William Willoughby William Willoughby from . About Family Children He has three children, Mary , Sir and Sir . Other facts about William Willoughby Given name William William Willoughby's Children (3) Mary Willoughby Sir William Willoughby, 1st Baronet Sir William Willoughby, 1st And Last Bt. Comments There are no comments yet. Enter your name here: Enter your email here: Enter your message here: Your message is required. Markdown cheatsheet. Submit