Thank you both!
I don't know when they moved to Canada, but I do know that John was born in 1773 in Boston, Suffolk, Massachusetts.
How do you know John was born in Boston? What record is it on, birth, marriage or death?
The children's births, including John's, really should be there if they were in Boston, the Boston records for that time period are pretty good. I'm thinking someone said he was born in Boston because his family had come from there.
----------
Some of the family might have returned to Boston.
There is a Rebecca Hill who died 7 Sep 1813, Boston, age 75, of consumption. buried Central Ground, tomb of Wm Homer
buried 8 September, undertaker: Comfort Claflen
someone's notes at findagrave for this burial:
Gravesite Details There is a possibility that tomb number 127 (old no. 39) is William Holmer's tomb. It may be just two up from the other Holmer tomb. She may be the mother of Sally (Hill) Homer.
https://www.findagrave.com/memorial/107428167Sally could be Anna, who is on a tree as having married a Mr Homer, see earlier reply.
-------------
There is no William Hill in the index of Boston deaths where I found Rebecca, and it covered 1801 to 1848. One tree I saw said he died in Sydney, and another said he died in Boston.
There was a Wm Hill with a Revolutionary Army record in Boston too, mid 1770's but that could be another man.