The son of ex-Wigan stand-off Greg Florimo is in the USA squad for the World Nines.
Jay Florimo is among the new faces.
The 29-year-old's dad, Greg, played for Italy and Australia during his playing career which included a stint with Wigan in 1999.
"Jay's mother was born on a US army base in Germany to an American father," said coach Sean Rutgerson.
"I tried to get in contact with him last year, was unsuccessful but was told when I took over that he was eligible.
"He actually finally got back to me on Facebook Messenger recently and I got him to send all his stuff."
Hull winger Bureta Faraimo has been named in the United States squad for the inaugural World Nines in Sydney on October 18-19.
Hawks coach Rutgerson has also included Sheffield Eagles forward Cory Makelim and Toulouse's former Hull KR winger Junior Vaivai in his 20-man squad.