I agree -- it's almost as clumsy to pronounce as cyanogenmod, and the meaning isn't particular inspiring or evocative. HeritageOS? AncestryOS? FamilyOS? DerivationOS? Why do I want to use it, now?
fair points...that was just the first thing that came to my mind. Better might be something along the lines of: LibreMobile
Of course you don't want too definitive to limit your options. But what I'm criticizing is things like "Cyanogenmod" (what does green-blue have to do with it? is is some type of element?) or "Android" (is it a robot?). Apple won a lot of users simply with a simple definitive name "iPhone". And you can have definitive names that leave options open, e.g. "YouTube" or "The FaceBook".