"Spanish" tuning is open G, DGDGBD, so called because it was the tuning required for the published music of the popular parlor tune Spanish Fandango, from the mid-late 19th cent. It went into tradition, sometimes as "Spanish Flangdang" or the like.

"Vestapol" is a corruption of "Sebastopol" which I believe was a piece of published music which required the Open D tuning.