That doesn't answer the question
I looked for an hour, I can't find any mention of it anywhere, other than a TOI piece of trash article saying that Mattan Kahane "doesn't want to run with Kahanists", and then you read their worthless rag and it just said "he doesn't like Ben Gvir". Still, it's like if someone runs for American president 30 years from now and his last name is Trump, there will be a million mentions about it if he's related. He also doesn't look like him or his brother at all. I do not believe so.