The idea that your legacy is primarily defined by one's offspring seems to just buy into current social stereotypes and doesn't really signify what the service is about as you described it. Other than that I think there might be some confusion with the "other" legacy (https://www.legacy.com also a YC company?) whose service is aimed at those on the other end of the life spectrum.

As someone who is actively looking for a sperm storage solution, the name didn't resonate with me, either positively or negatively. In fact, I forgot the name already once today and had to check my messages to find the link (told a friend about the service - very interested).

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.

Yeah, just the describing your children as your legacy seems like a gross way of thinking about the world to me. Not trying to detract from the value of what you're doing, or suggest that the name is a bad decision, just thought you might be interested in the reaction I had.

Personally I like the name. speaks to an idea of value.

For another data point, I immediately thought "that's a surprisingly good name!"

The Sperminator has a nice ring to it.