Bilefrid von Bayern was born circa 945 to Berthold von Bayern (c900-947) and Wiltrude de Lorraine (c930) and died circa 1010 of unspecified causes. She married Ernst V. von Dollnstein (?-c1007) .
Children
| Name | Birth | Death | Joined with |
| Ernst VI. von Dollnstein (c965-c1013) | 965 | 1013 | Adelheid von Moosburg |
| Hartwig von Regensburg (c966-c1005) | 966 | 1023 | |
| Guntpolt von Dollnstein (c967-c1022) | 967 | 1022 | |
| Altmann von Dollnstein (c968-1007) | 968 | 1007 | |