About the International Travel Passport and the level 1 CFA EXAM- URGENTLY

Hello, my name its Julio Molina de Moraes, im from Brasil (born here) and i have dual nationality (brasilian and spanish) because of my grandfather . I just have ONE International travel passport its from Spain, but the name written on the passport its my Spanish Name: Julio Ribeiro Estruch. When i took my dual nationality i need to register another name for use in the Spanish Citizenship, that used the second name from my grandfather that is Spanish.
This passport is an Valid International Travel Passport , however i wanna know if i can use that passport to took the exam because i gonna do the exam here on Brasil. And i wanna know if i pass on the exams what name will appear, because here in Brasil my name is Julio Molina de Moraes. I dont have another International travel passport with the Brasilian name, so i wanna know if i have to take one International Passport from Brasil i can change sending one Name/Identification Change Form for CFA.
Please i need to clarify those questions fast , thank you ! I send this message for the email of CFA and they didnt answer me, and i make one call and they told to me that i can make one Name/Identification Change Form ... but i didnt recorded this call. Anyone have trouble like this ?/

I need to know that fast because im doing the payment before September 21. Thank you !!! Waiting your response.

Julio