Probably not the Mamie Foy you are looking for, but it is an unusual name

Details For Marriage ID#503839
Groom Last Name: EVANS
Groom First Name: Willard L. (21)
Groom Residence: Meridian, Mississippi
Bride Last Name: FOY
Bride First Name: Mayme M. (19)
Bride Residence: Escalante, Garfield, Utah
Place: Escalante, Garfield, Utah
Date: 15 May 1938
County of Record: Piute
State: Utah
Volume: B
Page: 50
Comment: Certificate # 486