See David Zieroth.
David Zieroth and Dale Zieroth are one and the same. That is, the same person has published books under different names. As a young boy in school, there were two Davids in his classroom and he was accorded the name Dale as a substitute name, to avoid confusion. It stuck for decades. Finally, in middle age, he decided he ought to switch back to using his "real" name David. Strange, but true.