It hasn't been mentioned here, but I'm pretty sure on her twitter page Ikasan referred to herself as "Matsuoka Yuuri" (松岡侑李) ? Although that could just be a stage name, I don't know... anyway the link is there: twpf.jp/oikasano
It doesn't seem like a stage name at least ^^ You can put the info on her page, with the citation to the twitter profile if you like. If you are uncomfortable about assuming it's her irl name, it can be but in the aka field as well.
Regardless on if it's her irl name I'd just like to mention, that just because another wiki said something doesn't necessarily mean it's correct, as wikis are usually run by fans, and everyone can edit the information. (Of course the same applies to us as well ;))