FitzBernard, Joan “of Guernsey” Baroness Aubeney
| Birth Name | FitzBernard, Joan “of Guernsey” Baroness Aubeney |
| Gender | female |
| Age at Death | 39 years, 9 months, 25 days |
| Birth date | 1270 (Channel Islands, Guernsey, Channel Islands) |
| Death date | 26 October 1309 (Towcester, Northamptonshire, England) |