Multitude of Meanings
The Triquetra or Trinity Knot is a common Celtic symbol that bears unique meaning to each person who wears it. Often times it has stood for the Holy Trinity the connection between Mind Body and Spirit or for Past Present and Future. Jewelry bearing the Trinity Knot that is given by a man to his beloved is used in modern times to represent his promise to love honor and protect her throughout the course of their lives. In each meaning the connection between the three things is natural without being broken.
Gift of Love
To receive a ring bearing the Trinity Knot would be a romantic reminder of the commitment one has made to the person he loves whether as a promise ring or to celebrate a relationship milestone. As she wears the ring with pride she will think fondly of her love and the meaning behind the design.