Cognomen Porthun (Porthun 
) , all over the world, is a rare surname. The last name Porthun is habitual in Germany, where it is a rare surname, Norway, where it is a very rare surname, and Brazil. In absolute terms, it most frequently occurs in Germany, Brazil, and the United States. Very seldom, Porthun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Porthun | Germany, Norway, United States, Thailand, Brazil |
| paula porthun holocaust victim, b. 1863-09-15, DE (b. 1863) |
|
|
| johannes porthun DE (b. 1875) |
|
|
| jan porthun researcher (ORCID 0000-0002-4100-4361) |
|
Mr, Markus, Stella, Baryal, Robert, Renato, Renata, Rubens, Denise, Gisela, Gloria, Judith, Thiago, Elvira, Eunice, Farlei, Mariana, Manfred, Michael, Andreas, Richard, Runhild, Marcia, Marise, Frank, Vania, Ms, Ana, Curt, Bart, Luiz, Jose, Joan, Erik, Fred, Ilse, Gabriel, Maria, Angar, Batur, Karen, Karla, Edith, Erich, Ervin, Harry, Henry, Heinz, Susan, and Gragina