"I" index to A History of Montana, Helen F. Sanders, 1913 
USGENWEB Montana Archives 
  
Name	Page #
Iff, Robert	1694
Igel, Richard	1759
Ingersoll, George F	1296
Ingraham, Albert J	1269
Ingram, James M	1429
Ireland, Joseph N	915
Irish, Egbert H	1456
Irvin, George W	888
Irvine, Shelby	1021
Irvine, Thomas H	965
Irvin, James H	1655
Ives, George 	187