The Quaternary knot symbol is called such because of their four corners and four distinct sections within the design. Without a beginning or an end, these knots demonstrate infinite cycle paths which represent eternity.
Another special trait of Celtic knots, is their ability to display clan history and heritage. Families often created their own special knots as unique identifiers. Almost like a coat of arms. This makes it particularly challenging to guarantee the true symbolism and meaning behind each knot, for each groove and thread could have special meaning that is not widely known.
However, this knot remains a popular one due to its easy visual identity and difference to most other knots.