Why is the ninth month called September?
early 13c., fraght, from Middle Dutch or Middle Low German vracht, vrecht, meaning originally "cost of transport" and probably from a lost Old Frisian word, from Proto-Germanic *fra-aihtiz "absolute possession, property" (cf. Old High German freht "earnings"), from *fra-, intensive prefix, + *aik "to be master of, possess," from PIE *aik- (see owe). Meaning "transporting of goods or passengers for money" is from late 14c. Danish fragt, Swedish frakt apparently also are from Frisian. As a verb, from late 14c.