According to this article, Akiel Raffie, who is contracted to Fleetwood Town, is Sonny-Bill Williams' cousin. I wonder if he has any NZ connections? Father is South African and he grew up in Aus so might be unlikely.
Yeah no NZ eligibility unfortunately. Most likely connected to Sonny Bill through marriage. His wife being Alana Raffie, who he met in Sydney. The Raffies are probably 'Cape Coloureds' (Western Cape Sth Africa), which means they could well be raised as Muslims like Alana Raffie.
https://www.facebook.com/SAFutbolPlayersAbroad/posts/2297053990604040/
Born in Australia to a South African father and an Australian mother, Akiel and Keyaan Raffie are the latest rising stars to be discovered in Europe.
Both players are yet to play for Australia at any level, but Akiel was part of Australia’s U17 FIFA World Cup camp last year, unfortunately he had to be left out due to injury. Both players have expressed interest in representing the country of their father.