England
The ruler of England was King William I (William the Conqueror), who had ruled since 1066 and would continue to do so until 1087.
Gwynedd
The ruler of Gwynedd was King Trahaearn ap Caradog, who had ruled since 1075 and would continue to do so until 1081.
Moray
The ruler of Moray at this time was likely to have been Mormaer Máel Snechtai mac Lulaich.
Scotland
The ruler of Scotland was King Malcolm III (The Great Chief), who had ruled since 1058 and would continue to do so until 1093.