Ensign Ernst Krislanovich Leman (1894–1917) was a Russian World War I flying ace credited with five aerial victories.

Ernst Krislanovich Leman was born in 1894 to a middle class Lutheran family in Latvia.

It was the start of a series of valorous feats that resulted in the award of the Order of Saint George Fourth Class on 9 January 1917.

Kazakov recommended Leman for the Order of Saint George; the Fourth Class award was made on 13 November 1917.

[2] At the time of Leman's death, it was known that the Soldier's Councils of the Russian Revolution was calling for the murder of military officers.