Middle Name for french passenger ?

[Flubble]

Hi !

You ask for middle name to book a flight but I'm French and on my "ESTA " there 's only my firt name as requested.

Then my longhaul ticket is only with my first name too.

On French passport, the second first name is separate by a comma and we never use it usualy.

Could you please tell me if I have to put or not my middle name to avoid any problem with TSA regarding my ESTA ?

Thanks for your help.

[TheMiddleSeat]

Have you completed your travel?  Any tips you can share regarding this?

--TheMiddleSeat