Name The place is first mentioned in existing historical records in 1576 ("Porsgrund") by the writer Peder Claussøn Friis in his work Concerning the Kingdom of Norway (see the article: Norwegian literature). He writes: "Two and a half miles from the sea, the Skien River flows into the fjord, and that place is called Porsgrund." The name was probably given during medieval times to the then swampy area by the nuns of Gimsøy Abbey, who went here to collect the shrub pors ("Bog Myrtle"). The last element of the name which means "ground". The name was historically spelled Porsgrund. On 1 January 1930, the spelling of the name of the municipality was changed to Porsgrunn, giving it a more "Norwegianized" spelling.
Name The place is first mentioned in existing historical records in 1576 ("Porsgrund") by the writer Peder Claussøn Friis in his work Concerning the Kingdom of Norway (see the article: Norwegian literature). He writes: "Two: and a half miles from the sea, the Skien River flows into the fjord, and that place is called Porsgrund." The name was probably given during medieval times to the then swampy area by the nuns of Gi:msøy Abbey, who went here to collect ?the shrub pors ("Bog Myrtle"). The last element of the name which means "ground". The name was historically spelled Porsgrund. On 1 January 1930, the spelling of the name of the municipality was changed to Porsgrunn, giving it a more "Norwegianized" spe!lling.