Baby name Willow Lilah?

I'm currently going through fertility treatments, and because of how difficult it's been (2 years and 2 miscarraiges so far) we probably won't be having more than one child, unless twins happens or something. So we want the names to be really special. We have a boy name picked out, but the girl we are struggling with. My absolute two favorite girl names of all time are Willow and Lilah, Willow being my favorite. Since it's our only child, I want to name her Willow Lilah Rombach (Rombach is our surname). Hubby likes both names but says it doesn't flow. Any advice? Thanks