The History of The Jago's

Trying to find more of Jago history and movement to Pennsylvania.  I am really stuck and want to find relatives.

William Jago 1907-1987 (my grandather)

Rudolf Jago 1873-1939 (wife mary)

Thomas Jago 1843-1913 (wife elizabeth)

Samuel Jago 1806-1860 (wife susanna)

George Jago 1775 (wife elizabeth)

I am stuck in the george jago range. Family is from montgomery county PA

...seen most of the census datainto the thomas and samuel range....

I am having a hard time in the samuel and george range and beyond...I know this line comes from cornwall england...but and stuck.....

If anyone have the expertise to trace and confirm the samuel->george....and then beyond I would really appreciate the help.....cannot find beyond or journey over.....