Complex sentence: In Swallow the important landowners were Norman (the Bishop of Bayeux was William the Conqueror's half-brother Odo of Bayeux), but low in the Norman hierarchy, but those most likely to be actually resident in the village have distinctly Anglo-Danish names.
Split into simpler sentences: In Swallow the important landowners were Norman (the Bishop of Bayeux was William the Conqueror's half-brother Odo of Bayeux), though low in the Norman hierarchy. However, those most likely to be actually resident in the village have distinctly Anglo-Danish names.