This kind of piece is really a theme and variations. Another common type of piece is the Prelude and Fugue, two movements. The first is free-form, often melodic like a short sonata, or constructed of chords; the second is made like a round, like Row, Row, Row Your Boat except WAY more complicated.
Borne [borne] as a boys' name has its root in Middle English, and Borne means stream. Borne is an alternate form of Bourne (Middle English): place name.
Definition of wag. wagged. ; wagging. intransitive verb. 1 : to be in motion : stir. 2 : to move to and fro or up and down especially with quick jerky motions. 3 : to move in chatter or gossip scandal caused tongues to wag.