What does Luiz mean?
Luiz is an uncommon first name for men but a very popular last name for both adults and children (#17449 out of 150436, Top 12%). (2000 U.S. Census)
Luis (#99 a year ago) is the only popular varying form of Luiz (#unlisted) ranked in the Top 1000. These boy names reached the top of their popularity in 2000 (usage of 0.951%) and have become significantly less popular since (usage 0.901%, down 5.3%). Luis (#99) is the most trendy birth name among these. Below is a charted comparison of the usage of Luiz and corresponding names. (2014 Birth Statistics)