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Interestingly, Galileo's Sidereus Nuncius mentions "Galileo Galileo" on the cover.

https://en.m.wikipedia.org/wiki/Sidereus_Nuncius

I wonder if this is at all related to the question asked in this article.

That looks like the Latin ablative case, governed by the preposition "a" in the previous line. In Latin you can see many different forms of a name depending on its context in a sentence (the two most common in books' title pages being the genitive and ablative, roughly meaning 'of' and 'by').

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