Some community members believe "Perl 6" is a very confusing name: it uses a digit as part of the name and it conflicts with the name of a sister language "Perl". Some outsiders don't realize "Perl 6" is a brand new language—vastly different than "Perl"—and so avoid it, thinking they know what it is already. At the same time, some who love "Perl" come to "Perl 6" and feel tricked, because the language isn't the next release of that language, but an entirely different one.
To clear up the confusion, Larry Wall created a second name for the language, a "stage name" if you will. That name is "Raku". It can be used interchangeably with the original "Perl 6" name or even be combined with it to form "Raku Perl 6". Pick the one that works the best for you and use it consistently