| Infant Twins Hagenbuch | 21 Sep 1872 | 21 Sep 1872 |
| Iola Lorene (Hagenbuch) Bahler | 31 May 1913 | 1995 |
| Ira Hagenbuch | 25 Aug 1869 | 4 Jun 1940 |
| Irene (Cavanaugh) Hagenbuch | 1906 | 1951 |
| Irene Mae (Faus) Hagenbuch | 15 Mar 1920 | 7 Aug 2011 |
| Irene May (Hagenbuch) Neel | | |
| Isaac Hagenbuch | 16 Nov 1801 | 15 Jul 1878 |
| Isaac Hagenbuch | 1796 | 1855 |
| Isaac Hugo Hagenbuch | | |
| Isaac Marshall Hagenbuch | | |
| Isabella Grace Hagenbuch | 23 Feb 2006 | |
| Isaiah Hagenbuch | 7 Feb 1835 | 22 Feb 1835 |
| Isaiah Bomboy Hagenbuch, Sgt. | 10 Sep 1836 | 5 Feb 1912 |
| Israel Hagenbuch | 2 Feb 1883 | 1 Aug 1965 |
| Israel "Walter" Walter Hagenbuch | 9 Jan 1910 | 25 Sep 2005 |
| Issabilla "Sabila" (Lapp) Hagenbuch | 16 Jan 1862 | 22 May 1933 |
| Jacalyn Gay (Peloke) Hagenbuch | | |
| Jacob (Hagenbuch) Hagenbaugh | 23 Dec 1803 | 10 Aug 1888 |
| Jacob Hagenbuch | 27 Jan 1797 | 19 Mar 1870 |
| Jacob Hagenbuch | 15 Sep 1830 | 22 Sep 1893 |