Leanna, Duchess former Lord Provost of Aol of Arana de Mearra Gellin amni an Reuise gu Mhierra née Aol nan Arana

Leanna Maria Fernandina Ienna Fianna, Duchess former Lord Provost of Aol of Arana de Mearra Gellin amni an Reuise gu Mhierra née Aol nan Arana, or Leanna nan Aol (An Bhá nan Éirith Ghréine, 13 October 1989 ; Crannchóiste, 8 June 1988) was a Rockallic biologist and professor at the University of An Bhá nan Éirith Ghréine, and the last member of the House of Aol of Arana. With her death, the House of Aol of Arana went extinct.

Aol of Arana was an important scientist and researcher, and especially notable for her mission to map the Valley of Eternal Rain in 1962, where she named many of the plant and animal species found there, as well as many of the geographical features. Her name is memorialised in a plaque placed on a stone next to the Loch na Feoirr Rícicht.

She was married to Roderic, Baron de Mearra Gellin amni Reuise gu Mhierra, with whom she had no children.