"On Sunday, the athlete and his family sat down for an interview with Robert Griffin III where viewers got to know the Kniggas a bit more. The former football player made a joke asking if the family has been to Paris, France, referencing Jay-Z and Kanye West's 2011 track "N***as In Paris." In their conversation, RGIII asked how to properly say their last name, and the family stated it's pronounced "Kih-nay-guh" instead of how it sounds phonetically like everyone on social media has been saying."
Saw an interview with the father a few days ago, that's not how he pronounced it then... He used the, ah, French pronunciation prefaced with a K sound.