HaShem - Yahweh or Jehovah?

As I understand it "LORD" is a translation of "Adonai" which is the word Jews substitute for the name when it is read out loud.The transliteration Jehovah is German so the "J" would be pronounced like the English "Y". Yahweh is the best attempt (using English pronunciation) but no transliteration is certain since the actual pronunciation of the name has been lost (mainly because Hebrew is written without vowels and the textual markers used to assist working out what the vowels should be are for "Adonai" rather than the actual name).

From the Ded Sea Scrolls it turns out that at least some of the Septuagint comes from a different textual tradition than the Masoretic texts. A close match for the Septuagint Jeremaiah was discovered at Qumran. Other books contain readings which agree with the Septuagint or with the Samaritan Pentateuch rather than the Masoretic text.While not all the Septuagint translations are good they do offer a limited window on the variations that were in the Jewish scriptures at the time of writing.