| Matilda Teresa (Coughlin) Hagenbuch, Barton | 27 Sep 1871 | 25 Nov 1967 |
| Matthew Hagenbuch | | |
| Matthias Hagenbuch | 8 Nov 1730 | |
| Mattie Melinda (Pennypacker) Hagenbuch | 1893 | |
| Maude I. (Shipman) Hagenbuch | 1871 | 6 Jul 1958 |
| Maude Louisa (Hagenbuch) Harback | 28 Feb 1891 | 3 Aug 1976 |
| Maxine Bertelle (Hagenbuch) McHenry | 3 May 1920 | 28 May 2010 |
| May P. (Hagenbuch) Baker | 26 Dec 1895 | Mar 1970 |
| Maydell H. (Hagenbuch) Eksergian | 25 Sep 1902 | 4 Jun 1998 |
| Mayme Hagenbuch | 1907 | |
| McHenry F. Hagenbuch | 9 Oct 1892 | 22 Dec 1958 |
| Melanie Ann Hagenbuch | | |
| Melissa Dawn (Amundson) Hagenbuch | 25 Nov 1977 | |
| Melvin Albert Hagenbuch | 14 Jan 1924 | 9 Sep 2019 |
| Meredith Martin (Gurley) Hagenbuch | | |
| Merlin "Fred" Fred Hagenbuch | 27 Jun 1931 | 2005 |
| Merlin Fred Hagenbuch, Jr. | | |
| Merrill Andrew Hagenbuch, Sr. | | |
| Merrill Andrew Hagenbuch, Jr. | | |
| Michael (Hagenbuch) Hagenbaugh | 1815 | Apr 1892 |