Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
SEWER
As described in historical dictionaries
Patronymica Britannica (1860)
SEWER. Anciently a great ofBcor in royal and noble houses, whose duty was to set and remove dishes, to taste them, and to have the general management of the table. In Nornran times, the office of King's sewer was one of the most important of the court. Le Sywr is the curious orthography of the H.R.