Hello,
It appears that Margaret may have gone by Eliza in her "everyday" life... I saw several spots where this was the case. It also appears that Perry Co, Kentucky, was the home location for at least awhile. If you haven't already noticed, there are several men by the name of Calloway Napier in Find-a-Grave, all pretty much in the same general area.
"Kentucky Death Records, 1911-1963," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:N96F-9GD : 20 October 2016), Calloway Napier, 1947; citing , Perry, Kentucky, United States, Office of Vital Statistics, Frankfort; FHL microfilm 1,944,499.
Name: Calloway Napier
Name Note:
Titles and Terms:
Event Type: Death
Event Date: 1947
Event Place: , Perry, Kentucky, United States
Address:
Residence Place:
Gender: Male
Age:
Marital Status:
Race:
Occupation:
Birth Date:
Birth Year (Estimated):
Birthplace:
Burial Date:
Burial Place:
Cemetery:
Father's Name: Elijah Napier
Father's Titles and Terms:
Father's Birthplace:
Mother's Name: Rebecca Helton
Mother's Titles and Terms:
Mother's Birthplace:
Spouse's Name: Eliza Napier
Spouse's Titles and Terms:
Spouse's Gender: Female
Spouse's Age:
Spouse's Birth Year (Estimated):
Spouse's Father's Name:
Spouse's Mother's Name:
Note:
Reference ID: 27676
GS Film Number: 1944499
Digital Folder Number: 004180249
Image Number: 2200
***I also found this listing on WorldCat
Perry County, Kentucky marriages.
I hope this helps at least find a clue!
Thanks,
Christine