The Etymologies of Isidore of Seville - Pot-pourri

190 VIII.xi.101–xi.104 Isidore of Seville
are named Manes after the term for air, which is ,
that is “sparse,” or because they spread (manare)widely
through the heavens – or they are called by this name
because they are mild, the opposite of monstrous (immanis).
Apuleius says (cf. The God of Socrates 153) that it is
’ (“by opposition of sense”) that they
are called Manes, that is, mild and modest, when they
are terrible and monstrous, named in the same way as
the Parcae (see section 93 above) and Eumenides (i.e. the
Furies; lit. “the Gracious Ones”). 101. Ghosts (larva), they
say, are demons made from peoplewhoweredeserving
of evil. It is said that their nature is to frighten small
children and chatter in shadowy corners. 102. Witches
(lamia), whom stories report would snatch children and
tear them apart, are particularly named from ‘tearing
apart’ (laniare). 103. ‘Hairy ones’ (Pilosus, i.e. a satyr)
are called Panitae in Greek, and ‘incubuses’ (incubus)
in Latin, or Inui, from copulating (inire) indiscriminately
with animals. Hence also incubi are so called from
‘lying upon’ (incumbere, ppl. incubitus), that is, violating,
for often they are shameless towards women, and
manage to lie with them. The Gauls call these demons
Dusii, because they carry out this foulness continually
(adsidue). 104.Common people call one demon Incubo,
and the Romans called him ‘Faunus of the figs.’ About
him Horace says (Odes 3.18.1):
Faunus, lover of fleeing nymphs, may you pass lightly
through my borders and sunny fields.