The following is an excerpt from The Leffingwell Record.
Read it or download it for free at
http://www.archive.org/details/leffingwellrecor00leff

I also found a source online for getting a CD with the whole book.
http://www.digital-editions.com/LEFFINGWELL.htm

I will add more pages here as I review them. There is a very interesting description of the first Leffingwell in America, an investigation as to why there are no Leffingwells in England,  a very thorough listing of all the Leffingwells up until 1897, and also speculations about royal and native ancestors.

Read the whole book or download it for free at
http://www.archive.org/details/leffingwellrecor00leff

I will start the post the backwards, from the most recent past, back to the beginning.

Check out the next 4 pages for the direct descendants charts.