Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
SYER
As described in historical dictionaries
Patronymica Britannica (1860)
SYER. 1. Perhaps the same as Sayer. 2. Possibly the 0. French siciir, a sawyer, or sometimes a reaper. H.R. Le Syer and Fil. Syer.