Father Callahan was created in 1975.
Nancy Callahan was created in 1991.
Macho Callahan was created in 1970.
Callahan Tunnel was created in 1961.
Callahan's Crosstime Saloon was created in 1996.
Callahan's Lady was created on 1989-05-01.
Harry Callahan - character - was created in 1971.
Viviana Ortiz was born on 1986-09-12.
Aaron Carl & his gang Noreen Callahan(grandmother) Mother Father Pidge(pigeon)
Nikita Callahan's birth name is Nikita Carmen Callahan.
Pepe Callahan's birth name is Joseph Callahan.
The address of the Callahan Branch is: 450086 State Road 200, Suite 15, Callahan, 32011 1758
Kenneth Callahan has written: 'Kenneth Callahan: universal voyage'