Nathaniel Knyvett, (also spelt Knyvette, Knivett and Knevett), was born in Denver, Norfolk, England. Margeret was born in Delft, Holland.

National Archives (UK)
Reference: PRA 81 375 x 7
Quitclaim by Nathaniel Knivett of Rackheath, esq. of right in 24a in Ryston, Ash close and land in Gibbes Dike furlonge in Denver conveyed by Sir Miles Hobart to Edward Pratt on April 29, 1642, (May 8, 1648).

Reference: D231M/T403
Feoffment by Nathaniel Knyvett of Rackheath, esq., and Edward Shepley of Rackheath, gent., to Sir Thomas Pettus, baronet, of Rackheath and Lionel Gurling of the City of Norwich, gent., in consideration of 20s of Lords Meadow in Thorpe, (1654).

Reference: PRA 184 378 x 6
Quitclaim by Nathaniell Knyvett, esq. to Edward Pratt. Right in 2r 31p in Beane furlonge in Ryston, formerly copyhold of the manor of West Hall in Denver. For 21s 10½d, (April 19, 1657).

Folger Shakespeare Library
Reference: L.d.388
Nathaniel Knyvett to Roger Townshend, 1st bart. On address-leaf, notes on land holdings, (October 28, 1634).