author
b. 1886
Best known as a co-author of an early 20th-century embalming manual, he wrote practical nonfiction aimed at funeral-service professionals. His surviving published work points to a specialist writer focused on anatomy, embalming methods, and trade knowledge rather than a broadly documented literary career.

by Charles Otto Dhonau, Albert John Nunnamaker
Records available online identify Charles Otto Dhonau, born in 1886, as an American nonfiction author connected with funeral service and embalming. He is credited alongside Albert John Nunnamaker on Anatomy and Embalming (1913), a detailed manual on embalming practice and the anatomy needed for that work.
That book suggests a strongly practical style: clear, instructional, and meant for professional use. Dhonau is also associated with Personalities in Funeral Management, which further links his name with the funeral profession and its trade literature.
Biographical details about his life outside these publications are limited in the sources I could confirm, so a full personal portrait is hard to reconstruct. What does come through clearly is his role in a specialized corner of early modern publishing, where technical manuals like his helped shape professional training in the funeral industry.