Variable for Name and First Name at messages

Hello Giang,

at message 'Invoice Layout' I get the 'first name' and 'name' of client in the invoice - part 'Payment Address'.
How to use 'first name' and 'name' variables for other messages ?
I only found:
[PAYMENT_ADDRESS]
[PAYMENT_EMAIL]
[PAYMENT_TELEPHONE]

What are the correct variable names for:
FIRST NAME ?
NAME ?

Thanks a lot - Enjoy your time
Rainer

Just figured it out by myself:
[FIRSTNAME]
[LASTNAME]

That's OK!
Sincerely, Giang