Ah so in my own unique perspective of the DF I realized one of those funny little parallels JB likes to throw in. Maeve is the original naming of Mab, likely after the likes of Queen Maeve.
JB has largely transmuted this into Margaret/Molly.. but perhaps Harry's new nickname comes into play too, Molls.
I could see Maeve equating more to Molly, especially adding in the meta mirroring. but the new identity of Molls? What if that's the original of her "Mab"? Maybe it wasn't Mab, but Mabs.(Insert inverse meta joke about why everyone thinks Mab wants everything, she used to go around calling herself Mabs and people got confused about it being possessive lol)
Idk, just a thought. I foresee Molls being an important identity at some point.