Similar to the overhand knot – is also referred to as the “double overhand knot”, this just adds a few extra wraps around the cord.
How to Tie a Barrel Knot
Make a loop with the cord, then bring one end of the cord through the loop to create an overhand knot.
Wrap that working cord around the cord a few more times (3 to 5 times), making more loops around the cord.
Pull the cord ends to tighten the knot.