It sounds quite likely there would be a will, Julie, but not all Somerset wills have survived. Info on here:
http://www1.somerset.gov.uk/archives/Wills.htm
They do have an index of Somerset wills but it only starts at 1812. For some reason the link is not on the above page but here it is:
http://www1.somerset.gov.uk/archives/Catalogs.htm
If you have a look through the Index to Death Duty Registers on Findmypast it should show whether there was a will or admon but unfortunately this is not fully searchable by name so you have to plough through it.