"Pseudonyms, pen names, and noms de plume have been used by writers for many different reasons in many different eras. Everyone from Charlotte Bronte and George Orwell to Stephen King and J.K. Rowling have used pen names for all or part of their careers. This infographic from printerinks takes a closer look at literary pen names through history."
Pen-Names, Pseudonyms: When, Where, Why, and How
When and how to write under a pen name - useful stuff
Karen Blixen (1885-1962). Dansh writer also known by her pen name Isak Dinesen. Blixen is best known for Out of Africa, her account of living in Kenya Books - English - books for women - http://amzn.to/2luWfCU