at first I thought she changed her last name for privacy which I totally respect and understand if I was an influencer I'm not sure my parents would like our last name everywhere but she tags her mum and other family members in stuff a lot and does videos with them so that's clearly not it, its really bizzare to me she would lie about it you could just say "yes that is my last name but for x,y,z reason I prefer to go by Knowles"