No-one in an English-speaking country (England, Australia,
America, Canada, et al) would give Jinx / Jynx as a name to a child, unless they were a truly cruel parent (and those do exist! Lol).
Don't worry, you're not the only one who finds
Gianfranco confusing! He'll no doubt answer you anyway, but
Gianfranco is a contraction of
Giovanni and
Francesco - Italian forms of
John and
Francis. follow the hyperlinks for details on the meanings of those names :-)
Where are you from? (& sorry if you said it before and I missed it!) I'm Australian.