Dallas Reeves sent me this photo of Donny Forza with Johnny Forza. It makes you think the two are related due to the same last names and the resemblance.
Donny Forza did work for Chaos Men as Leif. His solo and service video were released last month.
Leif VS Donny Forza
It does feel like a marketing gimmick considering the reply of Johnny Forza with regards to Leif as his real life brother.