A Mathew Walker knot is a decorative knot that is used to keep the end of a rope from fraying. It is tied by unraveling the strands of a twisted rope, knotting the strands together, then laying up the strands together again.
It is not specifically known who Mathew Walker was, nor why this knot was named for him. However, early references from the 19th century suggest he may have been a ship's rigger in the British_navy.
Some knots are well adapted to bind to particular objects such as another rope, cleat, ring, stake or to constrict an object.
A rope containing a knot is weaker than an unknotted rope, because the loops of the knot impose uneven stresses upon the rope fibers.
For example, loop knots share the attribute of having some kind of an anchor point constructed on the standing end (such as a loop or overhand knot) into which the working end is easily hitched to using a round turn.