Aaron Ludwig Kumlien (March 15, 1853 – December 4, 1902) was an American ornithologist and the oldest son of Thure Kumlien. He took part in the Howgate Polar Expedition 1877-78 and collected a large number of bird specimens which led to the discovery of several new species including what is now known as Kumlien's gull (Larus [glaucoides] kumlieni). During the Howgate Polar Expedition, Kumlien kept careful record of the names used by Inuit for the birds. This was re-examined in 1961 by Laurence Irving, who found the names to be stable and in use across a large area.