Erna

Erna may refer to:

People

 * Erna (given name), a list of people with the name
 * Jeff Erna, American drummer
 * Sully Erna (born 1968), American musician and member of Godsmack
 * pen name of Anna van Gogh-Kaulbach (1869-1960), Dutch writer
 * Érna, or Iverni, a people of medieval Ireland

Other uses

 * Erna (mythology), a figure in Norse mythology
 * Erna (moth), genus of moths in the family Erebidae
 * Little Erna, the butt of Little Erna jokes popular in Hamburg
 * Erna (planet), a fictional world in C. S. Friedman's Coldfire Trilogy
 * Erna long-range reconnaissance group, a Finnish Army unit of Estonian volunteers which operated behind Red Army lines in World War II
 * Erna Raid, a former military exercise held annually in Estonia
 * Erna, Texas, United States, an unincorporated community
 * 406 Erna, a main belt asteroid
 * Enhancer RNAs
 * SS Erna, a German coaster in service 1922-46