U-V-Y

The letters U, V and Y were all taken from the letter “Upsilon,” and it may have been derived from the queer Hebrew form of “Ayin” which closely resembles Y. The letters U and V were interchangeable. Upsilon, known as the “Samian letter,” was used by Pythagoras as an emblem to represent the parting of the ways—the young man making a choice in life.