The State of New Jersey, Index of Wills, Inventories, Etc. in the Office of the Secretary of State, prior to 1901, is a three volume set. From the William B. Bogardus Collection we have those pages which contain persons with the names Brewer, Brower, etc. The indexes are arranged by counties. PDF files are available online at the following links:
Volume 1: Atlantic, Bergen, Burlington, Camden, Cumberland, and Essex counties
Volume 2: Gloucester, Hudson, Hunterdon, Mercer, Middlesex and Monmouth counties
Volume 3: Morris, Ocean, Passaic, Somerset and Union counties
There are no Brewers, Browers, etc. found in Salem, Sussex or Warren counties, or in the index to unrecorded or Prerogative Wills, or in the addenda.
In addition I have extracted all of the Brewer, Brower, etc. entries found in the New Jersey Calendar of Wills, 1670-1817, into one document which has been placed online.