The Mystery of God's Name

As Jesus shared His last Passover with His Apostles, He recapitulated that night some of the most profound teachings He had privately shared with them during their previous 3-1/2 years together. He finished His discourse with an open prayer to God (John 17) in which He emphasized a most important truth regarding a special relationship we have to God's name. But, what is that "name" to which He alludes, and to which we have such a connection? Is it "YHWH" as some contend, or is it a name that touches us personally and gives our lives the most sublime meaning?