I have the following Swillings.I do not know if they tie in with your ancestor or not, but they came from the same place.
My great-great grandmother, Frances Caroline White Born 1829 in Rome, Georgia. Her parents: Logan White born 1799 in South Carolina; and, Barbara SWILLING born Abt 1800 in Anderson County, South Caroling, died about 1872in Logan County, Arkansas.
Barbara Swilling's parents:George Swilling and Martha Yeldon of Abbeville County, South Carolina along Lane Creek.
This is all I have to offer. Let me know if you ever make a connection Vicki Huckelbury Fullerton, California