FOR ALL THAT DON'T KNOW, THAT IS (gOD'S) PERSONAL NAME, ALSO KNOWN AS THE TETRAgRAM. BUT IT IS DISPUTED HOW IT'S PRONOUNCED.
BUT I HAVE CAME ACROSS A SITE THAT HAS INSIgHT AND RESEARCH FROM A HISTORICAL POINT, PEEP:
http://www.divinename.net/
PEEP THE SUMMARY OUT FOR A gENERAL LOOK ON THE LEFT.