"Lorentz gauge" or "Lorenz gauge"? In electrodynamics there is a gauge condition named after Ludvig Lorenz: $$\partial^\mu A_\mu = 0.$$
In general relativity we also have a gauge condition defined as follow:
$$\partial_\mu \gamma^{\mu\nu} = 0.$$
According to Wald's book (eq. 4.4.11, p. 75), this is called "Lorentz gauge." I was wondering if that's a mistake. According to some lecture notes, this is also called "Hilbert gauge."
 A: "Lorentz gauge" is a very popular error.
arXiv:0803.0047 [physics.hist-ph] :

The Lorenz condition/relation and gauge are named in honour of the
Danish theoretical physicist Ludwig Valentin Lorenz (1829–1891), who
has first published it in 1867 [5, 6] (see also [7, pp. 268-269, 291]
and [8, 9]). However this condition was first introduced in lectures
by Bernhard G. W. Riemann in 1861 as pointed in [7, p. 291]. It should
be noted that the Lorenz condition/gauge is quite often erroneously
referred as the Lorentz condition/gauge after the name of the Dutch
theoretical physicist Hendrik Antoon Lorentz (1853–1928) as, e.g., in
[10, p. 18], [11, p. 45] and [12, pp. 421-422, 426, 542]. The table
below represents some results of searching over the Internet for
“Lorenz gauge” and “Lorentz gauge.” We see that the situation is quite
sad in favour of the wrong term, but there is a slight improvement
during the last 3 years. [5] Ludwig Valentin Lorenz. Uber die
Intensit¨at der Schwingungen des Lichts mit den ¨elektrischen
Str¨omen. Annalen der Physik und Chemie, 131:243–263, 1867. [6] Ludwig
Valentin Lorenz. On the identity of the vibrations of light with
electrical currents. Philosophical Magazine, 34:287–301, 1867. [7]
Edmund Whittaker. A history of the theories of aether and electricity,
volume 1. The classical theories. of Harper torchbooks / The science
library. Harper & brothers, New York, 1960. Originally published by
Thomas Nelson & Son Ltd, London, 1910; revised and enlarged 1951. See
also the 1989 edition: New York: Dover, 1989.

