6 Persone collegate a contea-di-jefferson
John I, Count of La Marche
1344–1393·Vendome, comté de Vendôme, France
Isabelle de Beauvau
1436–1474·Beauvau, Anjou, France
Walter Miller Clark
1884–1912·Jefferson, Montana, United States
Spruille Braden
1894–1978·Elkhorn
JD
Josephine Dolan
1896–1980·Basin, Jefferson, Montana, United States
HM
Helen Claire Mullen
1921–1959·Whitehall, Jefferson, Montana, United States