Scorpio - water over the dam - Manasseh
Taurus - from the 4 corners of the earth - Ephraim
Leo - the earth to be consumed the 2nd time by fire - Judah
Aquarias - there's something in the air - United ISRAEL

Notice how the Celtic Cross [seen at right] resembles the Zodiacal wheel
Celtic Crossat left emphasing the four points, of Aquarius, Scorpio, Taurus, and Leo surrounded by a circle. These four directions represent the four elements of air, water, earth, and fire.
The origins of the cross far exceed Christianity, but the shape changes from time to time to suit the times and cultures involved. The design first originated with the Astrological wheel.