Houstons, Jellison, Atwood & Coburn

Figured I would group all these fine ladies into one discussion, as they all have a couple common denominators.  Most were born in southern maine in the 1700's.  I'm hoping for any help or leads on their parents.  All my searches have come up empty so far.

1) Elizabeth Houston, b. 1737 in Falmouth, married Jacob Morrill

2) Marian Jellison, b. 13 May 1747 in Kennebunkport, married Job Knight

3) Betsey Houston, b. 17 Nov 1774 in Windham, married Elijah Knight

4) Martha Atwood, b. 15 Jun 1743 in Cape Elizabeth, married Moses Starbird

Lastly, the maiden name of the wife of Melvin Stow Coburn. (Melvin was b. 4 Jul 1831 in Albany).  I believe her name was Elizabeth.  Census records have her born in 1832 and likely passed sometime in the 1860's, as she's not listed on the 1870 census with Melvin.

Would be grateful for any information.