Who is Jacquelyn?

The new trailer for Unfortunate Events is out, and can be watched with subtitles on Netflix. The subtitles give us the name of each speaking character, including one Jacquelyn.

In set photos, we saw a poster for Zombies in the Snow with the names Gustav Sebald and “Jacquelyn Sn” (the rest was cut off). It’s almost too small to see, but it’s definitely there.

Is Jacquelyn the character formerly known as Jacques Snicket, Lemony Snicket’s sibling? PLEASE YES.