Invented brand name, that vaguely alludes to the expression "on the trail".
Ontrel has only six characters and only two syllables. Two syllable names make popular global brands. Examples of two popular syllable names include Dropbox, Sony and Lego.
Ontrel.com is a dot-com domain. Dot com domains are the most valued top-level-domain in the world, famously used by websites like google.com. Owning a dot-com says that you own the word "ontrel" online.