1 True Love refers to God
2 Turtle Doves refers to the Old and New Testaments
3 French Hens refers to Faith, Hope and Charity, the Theological Virtues
4 Calling Birds refers to the Four Gospels and/or the Four Evangelists
5 Golden Rings refers to the first Five Books of the Old Testament, the "Pentateuch", which gives the history of man's fall from grace.
6 Geese A-laying refers to the six days of creation
7 Swans A-swimming refers to the seven gifts of the Holy Spirit, the sacraments
8 Maids A-milking refers to the eight beatitudes
9 Ladies Dancing refers to the nine Fruits of the Holy Spirit
10 Lords A-leaping refers to the ten commandments
11 Pipers Piping refers to the eleven faithful apostles
12 Drummers Drumming refers to the points of doctrine in the Apostle's Creed
