Help identifying Great Comet signatures

I've made a lot of progress in the past couple months trying to identify who signed my playbill when I went to see Great Comet in May. I didn't know much about the show when I watched it, but it grew to be my current favorite. At this point, I thought it would be a good goal to figure it out while the show is still open. Can anyone help me out with these? Or let me know if I'm wrong? Or maybe it will help someone else. Either way!



Here's what I have so far:
1. Josh Groban
2. Andrew Mayer
3. Kennedy Caughell
4. Nicholas Belton
5. Azudi Onyejekwe (?)
6. Nick Choksi
7. Reed Luplau
8. Lucas Steele
9. Brittain Ashford
10.
11.
12. Heath Saunders
13. Gelsey Bell (?)
14. (Billy? Brandt? Balaga??)
15. Alex Gibson (?)

Updated On: 9/1/17 at 10:46 PM

Thank you so much! The "W" in 11 definitely looks like Cathryn's, anyway. Number 5 was definitely just me looking at the cast list and trying to match things up since it looked like an A and O -- I haven't seen his signature anywhere for comparison. I brought my mom to the show and asked to see her version, and it looks different on hers, but not enough to help. My only other guess would be Ani.

Here's the pic she sent me (We weren't next to each other, but she met Pearl and I met Gelsey, but not the other way around somehow) :