Olympia

 was a woman who left her family and their homestead on Mount Desert Island. Some time later her relative Danny wrote to her. Pleading for her to come home and help run the homestead. Whether she did or not is uncertain, the fact that the letter is both old and on Avery's desk indicates that, at least, the Fog consumed the homestead and at least one of the pair made it to Far Harbor for shelter.

Appearances
is mentioned only in the Fallout 4 add-on Far Harbor.