prize13-5, Exercise 1: What an opening's name tells you

Model answer (check the details):

The Ruy Lopez (1.e4 e5 2.Nf3 Nc6 3.Bb5) is named after the Spanish priest Ruy Lopez de Segura, whose book of 1561 is described as the first modern chess manual. But he did not invent the opening: earlier mentions exist, and what he did was recommend and discuss it. The name therefore records who wrote about the line prominently, not who first played it. Many opening names work this way, honouring an analyst, a book or a place.

Care: before saying that a master "invented" an opening, find the earliest source for the line and check who wrote it.