The name is derived from Slovakjaseň (ash tree). Jaseno means "place overgrown with ash trees".[1]
History
In historical records the settlement was first mentioned in 1274 as Jezen, Jescen. The original settlement developed into two villages. Horné Jaseno and Dolné Jaseno merged to Turčianske Jaseno in 1973. Before the establishment of independent Czechoslovakia in 1918, it was part of Turóc County within the Kingdom of Hungary. From 1939 to 1945, it was part of the Slovak Republic.
^Krajčovič, Rudolf (2009). "Z lexiky stredovekej slovenčiny s výkladmi názvov obcí a miest (18)". Kultúra slova (in Slovak) (6). Martin: Vydavateľstvo Matice slovenskej: 345.