Arena is from the same etymon, altered in application.
Examplesofetymon
etymon
The 'hawk'etymonis perhaps unlikely on onomastic grounds.
From theCambridge English Corpus
But thatetymonsuffers from a want of documentary evidence at a sufficiently early date.
From
Wikipedia
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Hydronyms from various languages can all share a commonetymon.
From
Wikipedia
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Coates speculates further that the "-i-" could have arisen by metathesis of the "-i-" in the last syllable of his own suggestedetymon(see below).
From
Wikipedia
This example is from Wikipedia and may be reused under a CC BY-SA license.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.