Kay may have been descended from a Yorkshire gentry family, the Kayes of Woodsome. The ‘Arthur Kaye of Hackney’, appointed overseer of Kay’s father’s will, was almost certainly the member of the Yorkshire family of that name known to have been resident in that parish at this time, although the will gives no indication of kinship. Moreover, Kay was described as of Yorkshire when he was knighted in 1607. His father became clerk of the Green Cloth in Elizabeth’s Household and, by the time of his death in 1589, owned considerable property in Hackney, where he lived, and elsewhere in and around London.
Kay was a gentleman of the privy chamber by 1608, when he acquired reversions to the posts of clerk and surveyor of the Ordnance, succeeding to the latter position the following year.
Kay made no recorded speeches and was named only to five committees in the fourth session of the 1604-10 Parliament, all concerned with legislation, including that for the bill to prohibit the export of ordnance on 17 March.
In early 1611 Kay was a member of the jury, allegedly packed with Howard clients, for the trial of Edward Morgan, arraigned for killing one of the sons of Sir John Egerton* in a duel.
In 1619 Kay was one of the official mourners at Queen Anne’s funeral and gave evidence of financial irregularities in the Ordnance at the trial of Suffolk.
