Hello John,
I'm a descendant of the Swallows from Harpenden, Kimpton and Wheathampstead.
My grandmother was Ellen Swallow dob26 February 1881 how convenient for the 1881.
Her father Enock dob 4 December 1842
His father Thomas (Swaller) dob 26th May 1812
His father George Swallow dob 1772
His father John Swallow (Jno) 1728
His father John Swallow (Jno) 1698
His father John Swallow 1670 (origin names!)
The last three I have yet to totally confirm.
Do you have any further info, I expect these are already amongst your collection of names
Chris Abbott