The Mennonite Kolbs who started out in SE Pennsylvania were descendant of five brothers who came to Germantown and Montgomery County in the years 1707 to 1717. Please see the further information below.
Access to the Kolb Family Genealogy by D.K. Cassel
This is the most complete genealogy of the descendants of this family.
Ralph Beaver Strassburger included a good bit of information on the Dielman Kolb family in his 1922 Strassburger Family History. See the link below for that information.
Here is a link to the line of Tillman Kolb whose descendants went to Canada.
The link below will lead to a brief summary of the history of the early Kolb brothers by Glenn Landis.
The Mennonite Encyclopedia GAMEO has some information on the Dielman Kolb family. See the link below.
Marika Kolb has put together a very extensive and careful listing of Dielman Kolb descendants focusing on the descendants of brother Johannes who went south and the more recent lines in Texas.
Linton E. Love has put together a very extensive list of descendants of Dielman Kolb