Minor correction. It is a “i” and not a “j”. Julius Caesar said “Alea iacta est” when crossing the Rubicon.
https://en.wikipedia.org/wiki/Alea_iacta_est
Although there is the WarCry album with the “j”:
https://en.wikipedia.org/wiki/Alea_iacta_est
Although there is the WarCry album with the “j”:
"It was not until the Middle Ages that the letter ⟨W⟩ (originally a ligature of two ⟨V⟩s) was added to the Latin alphabet, to represent sounds from the Germanic languages which did not exist in medieval Latin, and only after the Renaissance did the convention of treating ⟨I⟩ and ⟨U⟩ as vowels, and ⟨J⟩ and ⟨V⟩ as consonants, become established. Prior to that, the former had been merely allographs of the latter."
So at Julius Caesar's time, I and J were the same letter that you could write either way.
Why not "Iulius Caesar", for consistency? :-)
In any case, English may not be the right language to bicker about spelling and pronunciation in. It sports one of the most idiosyncratic orthographic systems in existence.
English also has a long history of butchering names, words and sounds, including its own (e.g. the Great Vowel Shift [0]). Iulius vs Julius is the least of its worries.