Pseudonym not found on published works: Murglie; Peter Murglie

Sources indicate that Murnau collaborated with Rochus Gliese on a scenario under the name Murglie, or Peter Murglie, the surname being a combination of their two names.

Rotellar, M. F. W. Murnau: Nosferatu, 1950.

The haunted castle, 1921: video container (Frederick W. Marnau)

Internet Movie Database, Oct 22, 2002 (b. 28 December 1888, Bielefeld, North-Rhine-Westphalia, Germany; d. 11 March 1931, Santa Barbara, CA (road accident); Friedrich Wilhelm Murnau; birth name: Friedrich Wilhelm Plumpe; one of the greatest film directors of the silent era; one of the three top German directors of the 1920s)

IMDb, October 29, 2018: (F.W. Murnau, director, writer, producer ; b. December 28, 1888 in Bielefeld, North Rhine-Westphalia, Germany ; d. March 11, 1931 (age 42) in Santa Barbara, California, USA ; alternate name: Murglie, Dr. F.W. Murnau, Friedrich Wilhelm Murnau)

F. W. Murnau (1888-1931) was a German film director.