Incidentally, the Star of David also has a Hindu parallel. Its called the Shatkonam in Sanskrit (SHUT-KO-NNUM). The pictorial diagram of the two is the same. Shatkonam means a star pointing in six directions. It is again, a symbol of prosperity and is drawn with rice flour, by the hand in front of many houses in Southern India, to invoke good fortune and peace.
I am unaware of any common origin or connection; shall post if I find anything.