Celtic pendant a la Goodwill

I'm having pretty good luck finding bling at Goodwill.these days.

First there was the amazing Tudor Rose pendant by "Miracle" jewellery makers in northern England.

Then there were several other retro baubles for $10 and under.

This medallion-like pendant with wonderful chunky chain: only $3.99. 

Anyone know what the design means? I tried looking it up but there are so many symbols.