There was a Dr Hubert E Allen in Richmond, IN when I was born there in 1928. Legend has it that mt parents gave me only one name, Clyde, but the attending physicisn thought he should report two names in reporting the live birth. So, he reported my name as Hubert Clyde Allen, presumably after Dr H E Allen. He was still there in my teen years in the early 40,s but I have no idea what happened to him after that. Could this be the one you are looking for?