Langdon Frothingham

I keep running across Langdon and Frothingham in my research. Either I find a person with Langdon as middle name and Frothingham for surname or some combination of the two. I've been searching the internet for the last few weeks and have finally made some connections. The Langdon name seems to have entered our tree with the marriage of Joanna Langdon to Ebenezer Frothingham (son of Nathaniel Frothingham and Mary Whittemore) in 1779. Does anyone have more information on this family?