I have Rebecca Bivins (Bivens) father as Fielder Bivins (Bivens) no listed mother.
I have Michael Swink listed as follows:
Michael Swink - Rebecca Bivens
Michael Swink (Schwenk) - Barbarba Smith
Hans Michael Schwenk - Mary
The Michael Swink married to Barbara Smith is also known as Hans Michael Swink (Schwenk) Jr.
Barbara Smith's parents were father Peter Smith (Schmidt) and mother Barbara no last name.
I have just recently started working on these lines and other than a few dates this is all of the information I currently have.
I would be interested to see any information you have on any of these lines as Martha P. Swink and George Tucker were my ggg-grandparents. I would be more than happy to share any information I have.