de Ahna, DeAhna or Deahna is a surname. Notable people with the surname include:
Eleonore de Ahna (1838–1865), German operatic singer Feodor Deahna (1815–1844), German mathematician Heinrich de Ahna (1832–1892), Austrian violinist Henry Charles DeAhna (1823–1891), Commander of the Department of Alaska Pauline de Ahna (1863–1950), German operatic singer, and the wife of composer Richard Strauss