Agnes Harewell

Per the IPMs of William and the writings of author Francesca Steele, William and Joan had two children. Oddly, William's IPMs don't mention a daughter Agnes. The sources below do indicate her as a child of William and Joan.

Davis, C. T. (1899) in The Monumental Brasses of Gloucestershire. London: Phillimore & Company, p. 33. Available at: GoogleBooks.

Leighton, W. A. (1878) “Notes Relating to the Abbey Church Estate, Shrewsbury,” in Transactions of the Shropshire Archaeological and Natural History Society. Shrewsbury, Shropshire, UK: Adnitt and Naunton, The Square, p. 309. Available at: GoogleBooks.

198. “Joan, late wife of William Clopton, knt., appoints an attorney to deliver seisin to John Throckmorton, Esq. of her lands in Hull and More next Pershore. Dated 6 April 6 Henry VI [1428]. She had also granted to Throckmorton in Hull and More, which she had." ... "...By her daughter Anne or Agnes, wife of Roger Harewell of Wootton..."
Read, P. C. (1994) “Another Look at Joan de Harley: Will Her Real Descendants Please Rise?,” in Thompson, N. D. (ed.) The Genealogist. Salt Lake City, UT, USA: Association for the Promotion of Scholarship in Genealogy, p. 71. Available at: GoogleBooks. Note: Volume 10 is only fully available by back-issue purchase.