E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A name of Minerva, sometimes called Pallas Minerva. According to fable, Pallas was one of the Titans, of giant size, killed by Minerva, who flayed him, and used his skin for armour; whence she was called Pallas Minerva. More likely the word Pallas is from pallo, to brandish; and the compound means Minerva who brandishes the spear.