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I always found this fact about the common Spanish surname Rodríguez to be interesting:

>The "ez" signifies "son of". The name Rodrigo is the Spanish form of the German name Roderich, meaning "rich in fame", from the Gothic elements "hrod" (fame or glory) and "ric" (rich). It was the name of Roderic, the last Visigothic King before the Muslim conquest, and the subject of many legends. The surname Rodríguez could have originated in the 9th century when patronymic names originated.

https://en.wikipedia.org/wiki/Rodr%C3%ADguez_(surname)

The Visigoths directly ruled in Iberia so that's an example of the "elite influence" spreading culture and language.

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"On the peninsula" ... I found elmo, does Galician count? https://en.wiktionary.org/wiki/elmo#Galician

There are plenty of other warlike terms in https://en.wiktionary.org/wiki/Category:Spanish_terms_derive... such as gaita (bagpipes).

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We have yelmo and almete, but looking up both of them, they seem to be considered later medieval loans. Espuela (spur), dardo (dart) and a few other warlike items are often mentioned. And of course guerra (war) itself.
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And tangentially, to this day Canary islanders'slur for peninsulars is "godos", in the sense of "arrogant and haughty"
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And in German the word is "Helm" as well
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And French has both casque (from latin) and heaume (from germanic languages).
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Yelmo for helmet
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