What is the correct spelling of British naturalist John Birkenhauer's name?

Answer 1

I can't answer that directly: However, I can say that the given spelling is a perfectly accurate version, as it is (exactly) the correct spelling of at least one living person. Birkenhauer is a not uncommon Germanic name with roots: "Birken" (Birch) and "hauer" (cut, same root as "hew", to chop wood). The name is historically a cabinet makers guild name. There are many slight variations that are close, I am not familiar with a British naturalist of that name.

Answer 2

There appears to be no known British naturalist by the name of John Birkenhauer. It is possible that the name is misspelled or inaccurate.