To me the name "legacy" is a huge turnoff, big enough that I probably won't use your service. Maybe it's just me though!
It is only while posting this that I am making the negative connection to things like "legacy code," but the concepts are distinct enough to me that they might as well be different words.
As a marketer (and the growth person on the Legacy team), I've learned you can't build a strategy or business that appeases everyone. Ultimately, a name is just a name.
Ultimately, we are working to help hopeful fathers build families.
Nothing about the name as it is now will stop me from becoming a customer, my decision will come down to the results of my research and the answers to my questions.
If so, then can you talk about which names you like more and they can do better. If you weren't in the market to begin with, then it might not matter for them.