A William Royce b May 18, 1792 in Orwell, Addison, VT son of Nehemiah and Cynthia Royce; d 1836 in Oak Orchard, MI with all the children you have listed is listed as #567 on page 114 of Al Rhods book, "The Royce Family in America".There is very little information on the children, and no wife is listed.
His book is available through him. Al's address is:
Al Rhods 180 Stoneway Trail Madison, AL 35758-8640
He and I are both interested in receiving any information on the Royce family.
My e-mail address is:firstname.lastname@example.org
Louis D. Rice President, The Royce Family Association