Meaning of Names - Help required

[John Patterson]

I am new to Butterflies and crave your patience.

I understand that Lepidoptera comes from the Greek and that Lepis =
'scale' and pteron = 'wing'

I am aware that there are 9 families of European Butterflies:
Papilionidae, Pieridae, Lycaenidae, Riodinidae, Libytheidae, Danaidae,
Nymphalidae, Satyridae, Hesperiidae.
I do not know what the names mean.
I do not know how these families got their names.

If you look at Nymphalidae - I know what a Nymph is, but what has that
got to do with this group of Butterflies.

Can anyone help me with what the names mean and how these families got
their names.

John Patterson