Are you still looking? I found some information that I would like to give you. It was difficult to find under the name STARFRACE. Your ancestors are listed as either STAFRAC, STAFRACE, STAFRACI, and STAFRACCI. The dates shown are just the years. I found them in this link: http://www.geneanum.com/tunisie.html
Let me know if you want me to give you what I found.