Take a look at Red Hat's guidelines, based on the open-source Model Trademark Guidelines (CC-BY-4.0), for comparison. They advise they consider it acceptable fo

Take a look at Red Hat's guidelines, based on the open-source Model Trademark Guidelines (CC-BY-4.0), for comparison. They advise they consider it acceptable for you to claim "[Your brand] software is built from modified source code derived from Red Hat Enterprise Linux." However, without additional permission you cannot "Use the Red Hat Marks in a way that expresses or implies sponsorship or endorsement by, or affiliation or a relationship with Red Hat when one does not exist." [0] https://www.redhat.com/en/about/trademark-guidelines-and-policies https://www.redhat.com/en/about/trademark-guidelines-and-pol... [1] http://modeltrademarkguidelines.org/index.php/Model_Trademark_Guidelines http://modeltrademarkguidelines.org/index.php/Model_Trademar...