Please note that Adonai appears in the old testament, which is the basis for many religious groups.
Without offense to the jews, there are about 13 million of them, but there are 2.300 million christians who also believe in the old testament, so if at all, it's a reference to several religions, not just one.
That it's an Hebrew word doesn't make it a Jewish word, just because hebrew is mostly spoken by jews _today_.
PS: I'm neither religious, nor do i care for political correctness, but i kinda freak out when people call a star jewish and a cross christian. There are too many layers of history and meanings over almost all symbols to accept such 'simple solutions'.