ISBN: | 978-5-5106-5030-3 |
High Quality Content by WIKIPEDIA articles! Oslac (fl. 966–975) is regarded as the first ealdorman (or earl) of York and its dependent territories. These included but may not have been limited to the southern half of Northumbria. His background is obscure because of poor source documentation. The latter has facilitated disagreement amongst historians regarding his family and ethnicity.