The 3 circle symbol used on this site??? ( 4thefamily.us )

It has many meanings.
The intent of the symbol from our perspective here at 4thefamily.us was to signify the union of three people in marriage (though, in no way limited to three). It is representative of the relationships being equal in purpose, commitment, and charity (love).

It seemed like the best possible symbol for what this site is about.

Variations and similar representations have been used in several cultures historically, to represent different things, from divine to pagan.

In Christianity they are called Borromean Rings and are commonly used as a symbol of Trinity: Father, Son, Holy Ghost. I chose this version of the symbol, instead of the equilateral triangle surrounded by a circle (which also represents Trinity in Christian faith), because Mormons believe in this concept differently (One God, three distinct personages). So it seemed to cover both faiths fairly.

In celtic tradition, a similar symbol (knots instead of rings) has represented the cycle of life: Life, Death, and Rebirth. It has also represented the three spheres of influence in the material world: Land, Sea and Sky

Variations of the symbols are also used to symbolize the Druidic Threefold Sister Goddess: Fotla/Eiru/Banba. Ireland, or Erin, is named after Eriu. It also symbolizes the Wiccan Threefold Mother Goddess: Maiden/Mother/Crone (or variations thereof).

The Hopi indians in Arizona have apparently used it as a symbol of tribal migration, cyclical in nature, by a people consisting of a few large tribes or clans.

There is more to be found concerning this particular symbol. It can be interpreted and misinterpreted according to anyone's perceptions, ideals, direction, or history.

The use of the symbol here at 4thefamily is defined as I mentioned earlier: union of marriage in purpose, commitment, and charity (love).

I kinda like it :-)

I found the following sites which sell medallions with the symbol (inverted)

https://www.familymedallion.com/comersus/store/comersus_dynamicIndex.asp

http://www.custom-celtic.com/pierced-pend.htm

-4thefam

"Thousands of candles can be lighted from a single candle,
and the life of the candle will not be shortened.
Happiness never decreases by being shared."
-Buddha

Almost looks Celtic doesnt it? I have wondered about it too. I agree with you about it making a pretty pendant.
Lia