Hello! I was searching in my books but I can't find the passage that states that Jacques and Kit are twins?
This was explained in my theory about the Snicket Family Tree.
The idea that Jacques and Kit are twins is semi-canonical. It mainly derives from Lemony’s 2004 Calendar of Unfortunate Events, where Jacques’ and Kit’s birthday are marked on the same day of the year. Which would lead one to think they are twins. However this calendar, because of its promotional nature, is uncertain in its canonicity. It’s possible it was not made by Daniel Handler himself.
Nevertheless if you observe the Snicket Family Tree in the un-Authorized Autobiography you can see that Jacques’ and Kit’s branches are fusioned, while the other branches (such as Lemony’s) are not. This could symbolize the fact they’re twins.
