Unless your name “Allison and Allison” becomes really well known, there’s not a lot of chance people will be googling it anyway. (And if they are, they may be savvy enough to put double quotes around it anyway.)
As has been said, you’ll need to be online for a fair while to have any chance of a familiar name like that to rise to the top of searches. You can help youself a little by making sure that name is prominent on the site. On your home page, your site name appears in an image with no alt text 
let alone replaced text. So you aren’t helping yourself in that regard.
But really, if your site is about “Pen & Ink Wallpaper”, you should be focusing on optimizing the content around that, as that’s more likely to be what people will search for.
And if people have heard your name and try to search for it, if they’re blessed with a modicum of intelligence they’ll likely type something like “Allison and allison wallpaper” or similar, which may get better results over time.