I do not know the origin of "Sandy" in THE LITTLE SANDY REVIEW (usually called LSR for short) but it was not, as far as I am aware, anybody's name. The magazine started in Minneapolis around 1960 and the editors were Jon Pankake and Paul Nelson. Latterly, Paul Nelson moved to New York but it continued to come out of Minneapolis, where Jon Pankake lived. Around the same time, their blues album reviewer became another jhoint editor. This arrangement continued up to Issue #30, though there were four later issues published in California under the LSR name. Paul Nelson went on to write for ROLLING STONE.
None of these people was called "Sandy", "Alexander", "Alexandra" or any similar name.
I would not wish to give the impression that all the reviews in LSR were scathing but the editors disliked commercial folk music and, as they termed them, "the Protesty people". In the mid-1960s, there were lots of releases of these kinds.
Given my background, you may be wondering what they made of Dylan. They knew him when he was a university student in Minneapolis and, despite the fact that he tried to steal some records from them, they were fairly balanced on the subject. Paul Nelson supported Dylan over his "going electric" at the Newport Folk Festival in 1965 and, later, wrote the notes for the BLONDE ON BLONDE folio songbook - notes that should be essential reading for anyone who has heard that album.