Prowde’s family were involved in the Shrewsbury cloth trade. His grandfather was a mercer, and his father a draper who served as one of the town’s bailiffs in 1569-70, while two of his mother’s brothers and at least one of his own brothers also became drapers.
Prowde’s own marriage, in 1590, brought him promising patronage connections, particularly through his mother-in-law, who in 1602 married Sir John Egerton*, a relative of the then lord keeper. Shortly before the wedding, Prowde was made a bencher of Lincoln’s Inn, despite having served only 16 years as a barrister (between 23 and 26 years was normal).
In 1613, as a Welsh justice, Prowde was co-opted by the Privy Council to report on an attempt by the London-based French Company to overthrow the Shrewsbury Drapers’ monopoly of the Welsh cloth trade. He naturally supported the interests of his home town, a favour which the corporation reciprocated by returning him to Parliament in the following year. His candidacy was probably endorsed by Richard Barker*, chief justice of North Wales and Shrewsbury’s MP in the previous Parliament, and the two men were entertained by the town’s all-important Drapers’ Company shortly before the election.
Prowde served as treasurer of Lincoln’s Inn in 1613-14, and would doubtless have acquired a serjeanty and, perhaps, a judgeship, but for his untimely death. He was buried, appropriately, in Westminster Abbey on 16 Jan. 1617, and his eldest son Thomas secured administration of his estate three weeks later. None of his descendants are known to have sat in Parliament.
