Jane Thwaites

Joan, daughter of Robert Thornton of Daveygate, was a great heiress.

From https://williamhenryfluen.de.tl/William-Thwaites.htm

JOHN THWAITES was married twice.

I. to JANE THORNTON by 1415

• (1) THOMAS THWAITES, ESQ. OF DENTON married to ALICE DE LA HAY
• (2) Henry Thwaites of Lund, father of the EDMUND THWAITES OF LUND above. He made his will 31. Mar 1478 desiring to be buried in the church of All Saints in Lund.
• (3) Joan Thwaites married Lionel Copley of Batley by 1444
• (4) Elizabeth Thwaites married Edward Brockett in 1450; the marriage brought Edward half of Steeton, which John Thwaites gave as a marriage dowry with his daughter, thereby making an alliance with the leading local family. In return the groom's family guaranteed the bride a juncture, an annuity in case of her widowhood, as mentioned in Edward's will.

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• page 10 of Testamenta Eboracensia: A Selection of Wills from the Registry at York ... edited by James Raine, John William Clay. "The will of Alice Thwaites, March 11, 1485/6."
• http://www.multiwords.de/genealogy/thwaites02.htm Douglas Richardson, Magna Carta Ancestry, 2nd Edition, Vol. II, p. 446. link Joan Thwaites, wife of Lionel Copley, mother of John Copley b 1444, Daughter of John Thwaites, of Lofthouse [no mother listed]