Albert Arnz (24 January 1832 – 9 September 1914) was a German landscape painter of the Düsseldorf school.

Another brother in law, the husband of his sister Marie Anna Fernandine (born 1829), was the Düsseldorfer painter Albert Flamm.

[1] Yet another brother in law, husband of Arnz's oldest sister Marie (born 1825), was the historical painter Joseph Fay.

[3] Finally, Friedrich (born 1826) married Antonetta Josepha, the sister of Düsseldorfer portrait and genre painter Philipp Schmitz (1824–1887), in 1851.

Combined driver Benno von Achenbach and naval engineer Oswald Flamm were nephews of Arnz.