William Swift was married to Joan Sisson.
William Swift II their son married Ruth Tobey.
William Swift III their son married Elizabeth Tomsen.
Benjamin Swift their son married Hanna Wing.
Benjamin Swift II their son married Waitstill Bowerman.
Paul Swift their son married Chloe Wing.
Moses Swift their son married Elizabeth Swift(a cousin).
Silas Swift their son married Martha Gifford Bowerman.
George Swift their son married Bertha Crane Bisset.
Laurence Swift their son married Laura Howland.
Laurence Swift their son married Elaine Lapage.
Leslie Swift their son married Kathleen Mcweeney.
As per my research.