I was upset when I knew that Perl 6 is a different language and not compatible with Perl and have the similar name
This has been discussed ad nauseam over the past ten years or so. Many folks have argued that Perl 6 should have a different name. However, Larry has not been persuaded. The clearest response from Larry that I am aware of was posted here:

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In reply to Re: Would you suggest alternative names for Perl 6? by eyepopslikeamosquito
in thread Would you suggest alternative names for Perl 6? by rsFalse

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