Deltan

Deltan is a masculine given name that is used primarily in Brazil. It is generally regarded as a Brazilian form derived from the word delta, and it can be connected to the Greek letter or to a geographic delta. The name is relatively uncommon outside Portuguese-speaking communities.

Notable bearer: The most widely known person with this name is Deltan Dallagnol (born 1980), a Brazilian federal prosecutor who became a prominent figure in the Lava Jato anti-corruption investigations in Paraná. He gained international attention through public briefings and media coverage related to the operation in the 2010s.

Other uses and usage: Beyond as a given name, Deltan does not have a widely used demonym or surname. Its use remains largely limited to certain communities in Brazil, with occasional appearances in fiction or media names.