Elizabeth married Sir John Rous, (also spelt Rowse), 1st Bart of Henham Hall, Sheriff of Suffolk, at Ashwellthorpe, Norfolk, England in 1656. He was born 1608 and died November 27, 1670. She died July 7, 1670.

National Archives (UK)
Reference: KNY 602-607 372 x 5
Elizabeth Knyvett, (wife of Sir John Rous), a sister
Family matters inc. her brother's proposed marriage, (nd).

Reference: KNY 488,489 372 x 1
Conveyance
From Thomas Knyvett Esq. of Ashwellthorpe to Anthony Knyvett Esq. and Elizabeth Knyvett Thomas's daughter of farm in Ashwellthorpe and Fundenhall occupied by John Sayer, as security for debt of £300 and on condition of payment of Anthony and Elizabeth of annuity of £24, 1637, and declaration of 1645 that the annuity was to use of Anthony for life then to Elizabeth, (1637-1645).

Reference: KNY 507,508 372 x 1
Copy of lease for term of 50 years
From John Rowse Esq. and wife Elizabeth to Anthony Knyvett Esq. of Westminster of messuage and 60a. land in Brusyard, Rendham and Cransford (co. Suffolk), with drafting instructions and copy of letter from Knyvett stating that the lease was security for a loan to Rowse, (1647).

Reference: HB26/412/318
Copy of will of Sir John Rous of Henham, baronet, dated October 12, 1670. All lands and tenements, except copyhold marsh ground called Subborn Marshes, to John Rous, his only son, but during his minority Sir John Knivett, Knight of the Bath, Thomas Leman of Wenhaston, Esq., and Thomas Dey of Eye, Esq., to act as trustees. Subborne Marshes to be sold to provide portions for Katherine and Letitia, his daughters. Proved May 31, 1671, (c1671).