The reason why in Trieste today live more than 250 families FONDA is WWII. After 2nd World War, when Piran (as Italian town, with Italian population) depended to former Yugoslavia, almost all FONDA families from Piran move to Trieste, the city in the neighbourghood. In year 1945 in Piran lived 67 (of all 1690) families and this surname was the most frequently surname (after Ruzzier with 70f.) in Piran in that time.
First FONDA in Trieste (found in local church book) was Pietro FONDA from the end of 18.century. In year 1903 only 20 FONDA persons registrated in Trieste, and in year 1945 abt.40 families Fonda lived there. It also known that in year 1990 in Rome lived 9 families FONDA, which originate from Piran, in Genova in year 1990 lived 5 FONDA familes and in Venezia 25 families (12 <- Trieste, 5<-Piran, 2<-Pula, 6<-other towns in Istria).
I already saw your web page about Fonda family in USA and it's realy great job. I decided, that you made correction on Jellis birthyear in GED file, but on your main page as year of his birth is still 1604. I remember that in the past found on the internet note how old Jellis and Hester were when they married, but can't find that source now. I have a printout of this. I remember that Jellis was only 1 year older than his wife.