It was my understanding that the name for Jesus in East Aramaic is Eeshoo. Do you guys not pronounce the EE or is it just not written?
(I spent some time with an ACOE offshoot church)
Eeshoo is fine. Both Assyrians and Chaldeans pronounce the double EE, and the Y is just another way of writing in English the EE pronunciation. The way it is written in Eastern Aramaic is with a Yodh, and there is no difference here between Chaldeans and Assyrians, except sometimes you will see a small Alap placed on top of the Yodh among Chaldeans. I’m not certain if Assyrians do likewise.
Alap is equivalent to an A, and it looks like this: http://www.learnassyrian.com/aramaic/alap.gif
Yodh is equivalent to a Y, and it looks like this:http://www.learnassyrian.com/aramaic/yodh.gif
The name of Jesus is written with a Waw as the letter before the final letter. In Eastern Aramaic, there is a vowel dot placed on top of the Waw, which then gives it an o sound. If the dot is placed underneath the Waw, then you get an oo sound. Therefore, it would seem best to say Eesho rather than Eeshoo.
Waw is equivalent to a W and it is written like this:http://www.learnassyrian.com/aramaic/waw.gif
As far as the ending letter of the name of Jesus, Chaldeans tend to pronounce it like this: Eesho**’ or Ysho’**. Among Chaldeans, the **’ ** at the end is a sound made with one’s throat rather than one’s tongue. It is the letter aih (or 'aih). Assyrians tend to pronounce this letter more softly than we Chaldeans do.
Aih has no English equivalent, and it looks like this:http://www.learnassyrian.com/aramaic/aih.gif
In general, Assyrians and Chaldeans use the same Eastern Aramaic script, but there is a slight difference in pronunciation between them. This difference is lighter than the difference between Eastern Aramaic versus Western Aramaic, which is a difference not only in pronunciation but script as well. Though I should point out that there is also a common base script between Eastern and Western Aramaic known as Estrangela (Estrangelo).
Here is a site that teaches Eastern Aramaic: learnassyrian.com/aramaic
I hope I have not bored you with this long-winded explanation