The Endless Knot is a symbol mostly used in Tibetian Buddhism. It symbolizes the endless cycle of birth, death and rebirth. Also it can mean an endless Love and Friendship. Since the knot has no beginning or end it also symbolizes the wisdom of the Buddha.
Irish Celtic symbols are very popular. All the symbols stand for something unique, and people often gift them or things having these symbols on them, to their loved ones. This article provides a list of some Irish Celtic symbols, along with the meanings associated with them.