[Colofornian]

Ann Romney's atheist father: Edward Roderick Davies
* Edward Davies Familysearch.org entry
* Edward Davies ancestry.com entry

It's this last entry that shows:

Death: 8 SEP 1992 in Stuart, Martin, Florida
Burial: White Chapel Cem, Troy, Oakland, Michigan
LDS Baptism: 19 NOV 1993 Temple: SLAKE
Endowment: 19 NOV 1993 Temple: SLAKE

Then they "sealed" him to her wife posthumously so they could live forever together:

...Sealing Spouse: 10 JUN 1994 in ATLAN

[VikingMom]

Oh, but I’m sure the MSM won’t bring up this story in the general election if Romney gets the nomination!

/sarc