The pentagrammaton or Yahshuah is a constructed form of the Hebrew name of Jesus originally found in the works of Athanasius Kirchner, Johann Baptist Grossschedel and other late Renaissance esoteric sources. It is to be distinguished from the name Yahshua found in the works of the Sacred Name Movement in the 1960s, though there has been some conflation or confusion between the two. The pentagrammaton Yahshuah has no support in archeological findings, such as the Dead Sea scrolls or inscriptions, nor in rabbinical texts as a form of Joshua. Scholarship generally considers the original form of Jesus to be Yeshua, a Hebrew Bible form of Joshua. The essential idea of the pentagrammaton is of an alphabetic consonantal framework Y-H-Sh-W-H, which can be supplied with vowels in various ways.
Renaissance occultism
The first ones to use a name of Jesus something like "Yahshuah" were Renaissance occultists. In the second half of the 16th century, when knowledge of Biblical Hebrew first began to spread among a significant number of Christians, certain esoterically minded or occultistic circles came up with the idea of deriving the Hebrew name of Jesus by adding the Hebrew lettershin ש into the middle of the Tetragrammatondivine nameyod-he-waw-he יהוה to produce the form yod-he-shin-waw-he יהשוה. This was given a basic Latin transliteration JHSVH or IHSVH or IHSUH. This could then be supplied with further vowels for pronounceability. It was a coincidence that the first three letters of this consonantal transcription IHSVH etc. were identical with the old IHS/JHS monogram of the name of Jesus. In Renaissance occultistic works, this pentagrammaton was frequently arranged around a mystic pentagram, where each of the five Hebrew letters י ה ש ו ה was placed at one of the points. One of the earliest attested examples of this diagram is in the Calendarium Naturale Magicum Perpetuum or "Magical Calendar" of either Theodor de Bry or Matthäus Merian the Elder. This idea of the pentagrammaton was funneled into modern occultism by 19th-century French writerEliphas Levi and the influential late 19th-century Hermetic Order of the Golden Dawn. The Golden Dawn favored the consonantal transcription IHShVH or YHShVH, and the pronunciation Yeheshuah. However, in all early Hebrew or Aramaic sources, the name "Jesus"/"Jeshua" actually appears as yod-shin-waw-`ayin ישוע Yeshua, so that the Renaissance speculations were incorrect. Note that the letter `ayin ע was specifically pronounced as a voiced pharyngeal consonantsound in ancient Hebrew and Aramaic, and could not be easily confused with either a pronounced sound or a silent Hebrew letter he ה.
Modern "Divine Name" groups
Some modern religious groups have speculated that the most correct form of the Hebrew name of Jesus should be based on the spelling yod-he-shin-waw-`ayin יהשוע. This Hebrew letter sequence yod-he-shin-waw-`ayin can be transcribed into English in various ways, including Yahshua, Yahoshua, etc.—see Yahshua. When a final "H" is added on to these transcriptions, or when such consonantal transcriptions as YHSWH or YHShWH are used, then it seems rather clear that there is confusion between the name of Jesus and the Tetragrammaton. The consonantal transcription YHShVH is used both by occultists and Divine Name religious adherents.