The names are indeed realistic, but some details are not.
First are cars: most tests I made produced cars that are not sold in Brazil, althought some did.
The lack of apartment or similar data in most addresses will not raise suspicion in the US, where most people live at houses, but it will surely jump to the attention of anyone looking at the database in Brazil. Not to say, it won't test most DBs properly as we commonly store apartment numbers in a dedicated column.
The English name of the companies also won't help.
As people are complaining of weird spanish, french, italian names, I wonder if the person who did this is brazilian.