The pull request changing the name of Perl 6 to Raku has been
merged. See the
full text for more information. “This document describes the steps
to be taken to effectuate a rename of ‘Perl 6’ to ‘Raku’, as described in
issue #81. It does not pretend to be complete in scope or in time. To
change a name of a project that has been running for 19+ years will take
time, a lot of effort and a lot of cooperation. It will affect people in
foreseen and unforeseen ways.” (Thanks to Sean Whitton)

Source: LWN.net – Perl 6 renamed to Raku