Emily Dickinson Lexicon

PUG, n. [Sax. piga, Sw. piga, a little girl; Dan. pige; W. baç, byçan; Sp. poco or pequeño, little; Ir. beag, from the root of pig, that is, a shoot, as we use imp. See Beagle.]

The name given to a little animal treated with familiarity, as a monkey, a little dog, &c. – Spectator.