Some 15 Focus tracks refer to individuals real or imaginary.
Orfeus and Euridice are, of course, from Greek mythology as is Orion. Venus is from Roman mythology (as in Ode to Venus on Focus 9).
Nobody seems to know who Bennie Helder is. No doubt, like Elspeth of Nottingham, he is imagined.
Le Clochard (meaning tramp in French) could be included here and may be Anonymus.
Sylvia, of course, is Sylvia Alberts; Tommy, Tom Barlage; Pim, Thijs's grandson (not Pim Jacobs as I had guessed); Eddy, Thijs's father; Janis, Janis Joplin.
Tokyo Rose was the composite name given to a number of Japanese broadcasters of propaganda in World War II.
Father Bach refers to the composer J S Bach.
One should also mention Judy, as in Ole Judy on the 1985 album