Irmgard an der Mangfall was born on an unknown date to Arnold an der Mangfall (-1030) and Irmgard . She married Friedrich I. von Regensburg (1030-1075) .
Children
| Name | Birth | Death | Joined with |
| Uta von Dießen (c1048-c1095) | 1048 | 1095 | Kuno I. von Rott (c1015-bef1087) |
| Friedrich II von Dießen (c1050-c1100) | 1050 | 1100 | Adelheid von Weimar-Istrien-Krain (c1080-1122) |
| Meginhart IV von Gilching (c1052-1070) | 1052 | 1070 | |
| Hemma von Dießen (?-?) | |||
| Liutgard von Dießen (c1052-1110) | 1052 | 1110 | Adalbert I. von Bogen (c1045-1100) |
| Berthold I. von Schwarzenburg (?-?) | 1104 | Tochter von Schwarzenburg (c1050-) Richardis von Spanheim (c1064-c1112) | |
There may have been a further son: Arnold III. von Dießen (c1050-c1096).
Residences
Footnotes (including sources)
| ‡ General |