I recently found out that Ante Trumbic is a distant relative and haven't been able to find much on him besides his wikipedia page. I understand he played a major role in the creation of Yugoslavia and is a signer of the Treaty of Versailles. If anyone could scrape up anything preferably in english that would be amazing. I also have a bunch of pictures of my family on austro-hungarian luxury ships leaving Split that Ill try to find.
One of the pictures I had on hand https://imgur.com/a/R7HtAAs
I can't unfortunately provide extensive information especially on Trumbic. Nonetheless, since it's been a while from your question, you might be interested in this (and part 1 if you want) comment that deals with the relations between the Yugoslav independentists and the Italian interventionists during WW1.