Help with a unique middle name

Becky
We have the boy name but need a girl name. The 1st name my hubby picked Emma.  It's a very common name and seems like rose, grace, pearl are all pretty common middle names and we have a common last name Harris. 
His moms is Yvonne which I like but not sold on it yet. Emma Yvonne. So ladies what do y'all think and help me with some suggestions. 💖💖