The following is an approximation of the family tree of PRR Lines West.
Part I.PITTSBURGH,FORT WAYNE AND CHICAGO RR
a.Ohio and Pittsburgh RR.
b.Ohio and Indiana RR
c.Fort Wayne and Chicago RR
d.Cleveland,Zanesville & Cincinnati RR
e.Cleveland and Pittsburgh RR
f.New Castle and Beaver RR
g.Ashtabula,Youngstown and Pittsburgh RR
h. Erie and Pittsburgh Railroad
i.Massillon and Cleveland RR

Part II.PANHANDLE LINES
a. Pittsburgh and Steubenville RR
b.Steubenville and Indiana RR
c.Hollidays Cove RR
d.Panhandle Railway
e.Little Miami Railroad
f.Columbus,Chicago and Indiana Central RR
g.Terre Haute and Indianapolis RR
h. St. Louis,Alton,and Terre Haute
i.Grand Rapids and Indiana
j.St Louis,Vandalia and Terre Haute RR
k.Cincinnati and Zanesville
l.Jefferson,Madison and Indianapolis
m.Indinapolis and Vicennes RR
n.Mansfield, Coldwater and Lake Michigan
o.Toledo,Tiffin and Eastern RR
p. Toledo and Woodvale
Last three merged into Northwestern Ohio Railroad.