F and V, The Swastika and the Dreidle

The Letters "F" and "V" are the "labials of the language". From the Book of Formation (Sepher Yetzirah), we find (and there are numerous translations), "The two sounds of each letter are the hard and the soft, the aspirated and the softened. They are called Double, because each letter presents a contrast or permutation;" - Source We can deduce that there is a design to the sounds. In the