I'd say they had done their research, his name is Glyn Myhill, Boaz is simply a nickname.
According to Wikipedia;
Glyn Oliver Myhill (born 9 November 1982), more commonly known as Boaz Myhill is a professional footballer who plays for West Bromwich Albion as a goalkeeper. Myhill also represented Wales until his international retirement in 2014. Having started his professional career at Aston Villa he later moved to Hull City, establishing himself as first choice goalkeeper.
Born in Modesto, California, the son of an American father and a Welsh mother from Llangollen, Myhill moved to England at the age of one. He attended the Marches School, Oswestry.
Myhill's parents originally intended to name him Boaz, a Hebrew name which they encountered and liked while travelling in Israel, but were dissuaded from doing so by relatives. Nevertheless, Myhill has been called Boaz, rather than by his official name Glyn, throughout his life.