There are at least known 3 bands with this name

1) - Aragorn, named after character in J.R.R Tolkien's the Lord Of The Rings, was a NWOBHM band formed in 1978 in Cheshire, England. It featured singer Chris Dunne, guitarist John Hull, bassist Dale Lee and drummer Mike Ellis. They were one of the earliest signings of Neat Records, releasing single "Black Ice" in 1981, which later came to grow in cult stature. Studio sessons for their first full-lenght album took place in 1982, but it never materialized despite repeated attempts to place these recordings with prospective labels. Aragorn was split soon after this. Their unreleased tracks were later collected into Noonday Anthology.

2) - "Melodic Black Metal" Band From Germany
Discography
1998 - Ancient Melancholy (EP)
2000 - Impressions (EP)

3) - Aragorn is a heavy metal band formed in Memphis, TN on 1997. Members:

Eric Brown: Vocals
Tina Steele: Lead Guitar
Justin Helton: Drums
Shane Holley: Bass
Kevin Thompson: Rhythm Guitar

4) - Aragorn was a South African band that formed in 1987 and then morphed into Stryder around 1989. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.