There are some suggested meanings of the name, which seem to come from places such as Estrogil (Chepstow) and 'The Strong people who lived on a hill ('nell')', which as yet provide no evidence to support these theories. Similarly there is a suggestion that the name is from Norse (after King Strogo) but nothing supports this. A stronger presence of the name on the east coast in this country might be expected. The evidence that the name dates from the thirteenth century in its present form means that further investigation will be needed to see if there is any indication of a foreign/European origin. People with the name today can be confident of an ancestry back to England.