Markus Toivonen and Kimmo Miettinen were originally members of a band called "Dark Reflections" that performed covers of Pantera and Megadeth songs.

The character featured in every album artwork of Ensiferum is Väinämöinen. Väinämöinen is the central character in the Finnish folklore and the main character in the national epic Kalevala. Originally a Finnish god, he was described as an old and wise man, and he possessed a potent, magical voice.

The cover artist behind all of Ensiferum's album covers, Swede Kristian Wåhlin, has also been responsible for such landmark album covers as Dissection's Storm of the Light's Bane, Emperor's In the Nightside Eclipse and At the Gates' Slaughter of the Soul.

Ahti (which is a song from their third album "Victory Songs") or Ahto, is the god of the sea and fishing in Finnish mythology. The assumption of Ahti being a Poseidon-like equivalent god of Finns, however, has no basis in ancient Finnish poetry.

In 1997 Jari had to put his musical career on hold to take part in Finland's compulsory military service. In an interview Jari admitted he disliked the time he spent in the military, and suspects it's where he acquired tuberculosis.

Wintersun was initially planned by Jari as a parallel project alongside Ensiferum, but in January 2004 he was forced to leave Ensiferum due to clashes between their touring schedule and the studio recording time he had booked for Wintersun.

The Space Agency called a star in the Dragon star system "Ensiferum" after a request from the band's fan base.

Ensiferum is Latin for "the sword-bearer".