Also, in the other idea of the Sequel Trilogy continuing immediately on from the third film in the OT: Luke’s long-lost sister (i.e., not Leia) is named either Nellith or Mara, depending on whether she’s a former Sith Lord or a former space pirate.
The former name suggests Lilith, Adam’s sinful first wife from Jewish lore, and parallels the Catholic Marian symbolism associated with Leia. The second, from Mara the tempter demon in Buddhism, stands outside Christianity, as pirates stand outside polite society. (Hence Mara Jade’s name in the Thrawn trilogy.)