Long ago, on one of the PBS specials, perhaps The Story of English-- the commentator stated, "Glammor, is a misspelling of Grammer" and went on to say grammar, like grammar school, is of language and learning (ie, being literate.) but, grammer, goes back to the root of Gram (1/28 of an ounce) "what is written" (the weight of ink on the paper!)

how funny!

and gramercy (which i was sure was related..) has nothing to to do with grammar.. it, like charing cross, is a coruption of french, grand merci, (archaic for thank you very much!)

just though every one would enjoy that....