Named by whom? The term did not even show up until the 20th century, so it wasn't the christians who named it like that. Pure Spanish myth. Oh, and the battle that started it all? Never even existed. Pure historical revisionism for nationalistic purposes with no more reality that horned vikings.

There are many things wrong with the term. A "reconquest" also makes it sound like the area was under siege by the Arabs or something. But the fact of the matter is that the peninsula, except for perhaps the Basque country, has been a melting pot of cultures under the succession of rules by larger empires. It's not like those christians, or the "Spanish", held control at some point, lost it, and then got it back; they never had it in the first place or even existed as a nation. So it's just a ridiculous term altogether.

https://www.lavanguardia.com/historiayvida/20191208/47205574...

https://blogs.elpais.com/historias/2015/04/la-batalla-de-cov...