Irish ~ Celtic, Love Knot, Trinity Knot
There are many different Celtic symbols. The Claddagh ring is traditionally worn as a wedding band. The heart held by two hand is a symbol of love and the ring itself is a symbol of love, loyalty and friendship. Celtic Knots are another symbol used at weddings because their interlacing lines stand for no beginning or end and the binding of two spirits. The Trinity Knot represents the three promises of a relationship such as to love, honor, and protect.
Image from TheWeddingOutlet.com