no real ideas, but I got Yumi's name from a japanese horror movie, When I was just hoping for a yorkie eventually. I had never heard of it before and absolutely fell in love with it. I was like omg! Yumi (Yoo mee)the yorkie! It's perfect. I ended up getting Yuri before Yumi. I just thought Yuri sounded good with it.
Maybe you could look at a baby name site some have lists of unique names.
Unique Names | Unique Girl Names | Baby Names | Parents Connect