Proper noun
A river in West Sussex, England, which flows into the English Channel
A local government district of West Sussex, formed in 1974 and named after the river, with its headquarters in Shoreham-by-Sea
Source: en.wiktionary.orgIt seems possible that the people of the Haestingas may have had their own ruler for a while, and another sub-division may have been along the River Adur. Source: Internet