I think one of the gossip sites said "Mannie is from オーストラリア", hahaha~ (
http://jiyuzine.grandfun.biz/archives/cat62/post_862/ This one? Or maybe another one...)
http://www.mxinsite.com/740.html
http://trend7777.com/4327.html
These sites seems to have a bit of the 'info' that we're missing.
- Ryon Ryon / 野村涼子 is the ex-wife
- he had her last name because he was a son in law 'taken into' Ryon Ryon's family, but changed it back after the divorce
- they married in 2005
- the "still married" thing is a theory?
- for some reason it's thought that maybe an affair Ayu was the reason they broke up (though that's usually what people think generally)