My maiden name is Hagenah, and my grandfather was Rudolph Hagenah. He had 2 children, Rusell Hagenah and Trudy Hagenah.
He was married to Florence Gorman. He died in 1984, I believe. I dont know if we are the Hagenahs you're looking for but I have noticed that there are quite a few looking for ancestors, and I thought we were the only ones with such a peculiar last name. Hope this would help you; if not good luck in your search.