In doing research in
Pike County,
Penn., on the Blackmore/Blackmer family, I found the following information copied from headstones in a cemetery in Paupack:
Amanda
Rake Blackmore, wife of J. R. Blackmore,
B. 13 Oct 1865 -- D. 9 Nov 1918
Joseph R. Blackmore - B. 10 Oct 1852 - no death date
If this woman is related to your
Rake family, it is likely you would be able to obtain a death certificate, which might provide you with the names of her parents.
I hope this will be of some help to you.