A younger son of the long-serving treasurer of Queen Elizabeth’s Household, Knollys thrived at Court, and despite attaching himself to his nephew Robert Devereux, 2nd earl of Essex, he avoided falling under suspicion after the earl’s rebellion in 1601.
Knollys spent most of his time in London, but acquired a Breconshire estate by marrying Catherine Vaughan, heiress of Porthaml. His right to parts of this property was challenged in the 1580s by his wife’s aunt Blanche Parry, chief gentlewoman of the privy chamber, who claimed to have been appointed executor to Catherine’s late brother, William Vaughan. She further alleged that Knollys had tried to gain possession of the estate through ‘wicked, ungodly and abominable practices’, including a riot at the Breconshire assizes.
The accession of King James brought the Knollys family further preferment, as Sir William was ennobled, while Sir Robert was knighted and granted a lease of Crown lands in Breconshire.
During the first Jacobean Parliament Knollys is recorded to have said very little, but he was named to numerous committees. He showed some interest in religious and moral reform, being named to consider bills against ecclesiastical pluralism (4 June 1604; 19 Feb. 1610), clerical subscription (14 Mar. 1610) and swearing (30 May 1610).
Knollys’s disposal of his Breconshire estates may have been largely due to financial problems, but he may also have been concerned to obtain the best possible settlement for the two daughters who were his heiresses. Having settled the Breconshire lands on the husband of one, he purchased the wardship of Framlingham Gawdy* in 1606, to whom he married his other daughter (at his London residence) in 1609.
Having disposed of his estates, Knollys attempted to secure fresh income as a projector at Court, and some of his plans were reflected in his parliamentary interests: on 16 Apr. 1604 he was appointed to consider a bill to explain the Common Law in certain letters patent,
Knollys was named to committees for various private bills: that for assuring the jointure of the new countess of Essex (13 Mar. 1606) recalls his relationship with his nephew, the 2nd earl.
As a veteran Member, Knollys was well placed to comment on matters of privilege and procedure, and on 19 Nov. 1606 he was named to the select privileges’ committee for that session.
As a Westminster resident, Knollys was named to consider the bill to curb new building in and around the capital and to prevent the division of existing properties into tenements (27 Apr. 1604). This presumably also explains why he was appointed to consider bills for the regulation of Thames watermen (9 May 1604), and the funding of a college at Chelsea (22 June 1610). He was appointed to the large deputation which heard the king’s initial plans about the Union (14 Apr. 1604), and on 29 Nov. 1606 he was appointed to consider the Instrument of the Union, but he otherwise played no part in the debates on this issue, which engendered considerable dispute.
Financial difficulties dogged Knollys down to his death. A letter from one creditor in February 1613 recounted that, since the time of Elizabeth, Knollys had been complaining of his ‘extraordinary charges and expectation of recompense from the Court’, hopes which had persisted after James’s accession, at which time Knollys had incurred further ‘great expenses and charges in Triumph’ – apparently referring to a type of card game.
The clamours of Knollys’s debtors echo in the surviving correspondence of his twilight years. In 1616 William Garway reminded Knollys of an outstanding debt, but worried that he ‘neither answers his [Garway’s] letters nor will speak with his man’.
