I need to pronounce the name Unzurrunzaga when I announce a girl for a Debutante Ball. I have not met her yet, and would like to have a better understanding prior to saying her name. She is an exchange student.
There's not a single way of pronouncing this name, but I can give you two approximations.
[ uN θu ruN 'θa ɣa ] [ un su run 'sa ɣa ]
As you can see, the main difference is that the first one is pronouncing the Z as a voiceless dental non-sibilant fricative, as "th" in the english word "thing", while the second is using a voiceless alveolar fricative, as the "s" in the english word "sound".
Both pronunciations would be correct, although she is probably more used to one of them (the first one if she comes from Spain, the second one otherwise).
Just Use Forvo
It's a good idea to use a pronunciation repository like Forvo. You can find the pronunciation of Unzurrunzaga or request new pronunciations.