This is a family that comes up as a bit of a mystery to me when I am trying to follow a Jane Giles née ?, the mother of Elizabeth Ann Giles who marries a Johns and then marries Edwin Chown. Jane was supposed to be born Padstow, Cornwall.
From freecen (and family search), in 1861 Jane was 54, a Laundress, living in St Columb, Cornwall, the head and only person in her household, and deaf.
From family search, in 1871, Jane's 62, a laundress, born St Minver, Cornwall, and living in St Andrew with Elizabeth A, now Johns and a widow, born Padstow, and Elizabeth's 2 sons William John and John, b Plymouth.
From family search, in 1881, Jane's 68 (strange ages!), living at 38 Treville St, Plymouth, still b St Minver, Cornwall, and still a widow, now with no occupation. She's with Elizabeth, Elizabeth's new husband Edward (Edwin from other info) Chown, Edwin's sons William and Alfred & a William Johns who family search says is sister son but probably meaning step son of Edward
By the way, from freecen there were more people living with the Lynches and Giles.
Tracking down Jane before 1861 is really hard, and I had your family down as a vague possibility. I think she may have died 1886 from freebmd, in Plymouth. I'm only vaguely sideways and through in-laws, related to her.