Hi Stephen, there is a death certificate for William F Swygart in the North Carolina Death Records database on ancestry.com. Please let me know if you do not have a subscription and would like a copy of it. He died 24 Aug 1911 in Mooresville, Iredell Co., NC. He was born 10 Mar 1867 in Germany.
I found a death record for William F Swygart, who died in Iredell County, NC in 1911. He was married, it does not list his wife's name. Its interesting that on Regina's death record, she is listed as Regina Deaton Cashion, not Swygart, if they actually married, its odd.
But, I just checked the 1910 census, and he matches the death record. He died in Mooresville, and was a harness maker. The 1910 census states that he and Regina were married 11 years.
In 1900, I find a Wilmer Cashion living with his inlaws, he had married a Minnie "Softly" less that a year before the 1900 census. He was born circa 1877. They were in Mecklenberg County. I find his wife's death record, but not his yet-
I found an Everett Cashion, birth year circa 1887 in 1930:
1930 United States Federal Census
Name: Everett L Cashion
Home in 1930: Eau Claire, Richland, South Carolina
Estimated Birth Year: abt 1887
Birthplace: North Carolina
Relation to Head of House: Head
Spouse's Name: Rosa G
Everett L Cashion 43
Rosa G Cashion 37
Ross Cashion 2 1/12
Source Citation: Year: 1930; Census Place: Eau Claire, Richland, South Carolina; Roll 2209; Page: 1A; Enumeration District: 33; Image: 671.0.
could this be the Everett, son of Regina and Andrew?