What does Luiz mean?
Luiz is an uncommon first name for men but a very popular last name for both adults and children (#18114 out of 88799, Top 20%). (2000 U.S. Census)
Below is a charted comparison of the usage of Luiz and corresponding names. Luis (#99 a year ago) is the only popular varying form of Luiz (#unlisted) ranked in the Top 1000. This boy name reached the top of its popularity in 2000 and has become significantly less popular since. Luis (#99) is the most trendy birth name among these. (2014 Birth Statistics)