Looking at this site's Pronunciation Guide, the Swedish pronunciation should be more like YUU-lee-uus (or perhaps YUW-lee-uws, I have a hard time telling the difference between UU and UW). You can listen to the Swedish pronunciation here: https://forvo.com/search/Julius/sv/ UY as in French "feu" (used as an example in the Pronunciation Guide) sounds more like how Swedes pronounce the letter Y.
― Anonymous User 5/1/2021
1
JOOL-yəs and JOOL-ee-əs in English, YOO-lyuws in German, YOO-lyoos in Dutch and Danish, YOO-li-uys in Swedish and Norwegian, and YOO-lee-oos in Finnish and Classical Latin.
Because they didn't have j's in Latin the Romans would have started this name with an I which is why it is pronounced yoo`lius. (Also as a side note, they didn't use u's either and instead used v. So this name would look like this: IVLIVS.)
• https://nl.wiktionary.org/wiki/Julius (in Dutch)
• https://nl.forvo.com/search/Julius/nl/ (in Dutch)
Converted to IPA, it should be: /'jy.li.ɵs/ [noted -ed]