The Osmundlaws were an old family, originally connected with Furness in north-west Lancashire, although by the early 14th century a branch had settled at Waverton in Cumberland. William’s early life remains obscure, but he was evidently a landowner of some substance, at least by the time of his son’s marriage. According to a lawsuit brought some years after his death by his widowed daughter-in-law, he had then been able to dispose of property in Carlisle, Aketon, Aynthorn, Blencogo, Dundraw, Kelsick, Lowthwaite and Whitrigg. Even allowing for exaggeration on her part, it is evident from an enfeoffment of 1400 that he did indeed own land and tenements in Carlisle, Aketon and Aynthorn, as well as other holdings in the vills of Botcherby, Caldecotes, Cummersdale, Etterby, ‘Solum’, Stubsgill, Whelpo and elsewhere in Cumberland. He is, moreover, said to have built Langrigg Hall, which become the family seat; and he also enjoyed a life tenancy of messuages and land in Blindcrake and a burgage in Kirkby in Kendal (Westmorland).
William is first mentioned in June 1382, when he stood surety at the Exchequer for the farmers of a royal fishery at Carlisle. In the following year he represented the borough in Parliament, but he did not otherwise show much enthusiasm for the business of local government. Indeed, he seems to have confined his interests to acting as a feoffee-to-uses for Sir Robert Muncaster in Threapland and Blennerhasset, being assisted in this capacity by his neighbours, Sir Clement Skelton and Thomas Sands. He may, perhaps, have been related to Sibyl, the mother or stepmother of Robert Bristowe, for whom he appeared as an attorney at Penrith in 1392, when she was involved in a collusive lawsuit. Some years later he and John Eaglesfield offered bail in £40 for a local man at the Carlisle assizes, so his relative inactivity at this time was not due to a lack of useful connexions.
By October 1411, our MP had become engaged in a round of litigation with two defendants from Cumberland over a debt of £20, but they never appeared in court and were duly pardoned the sentences of outlawry passed against them. He died at some point after 1423, leaving at least one son, William, who in 1434 leased the abbey of Bromfield in Cumberland from the abbot of St. Mary’s, York. Thomas and Robert Osmundlaw, his mainpernors on this occasion, may well have been his younger brothers.
