Romanization of names gets messed up in official ayu materials all the time... She has one graphic designer whose name is listed as either "hidetomo" or "tomohide" depending on the release, and I've seen credit given to a photographer named "Shimomura Kazuki" which... is a really big coincidence if it's not Shimomura Kazuyoshi that they meant (although Shinichiro Watanabe and Shinichi Watanabe ARE two completely different anime directors, so it's certainly possible
)... there's also ayu's video director, Hideaki/Hideo Sunaga.