EDIT Da/Դա is the 4th letter of Armenian alphabet. Its minuscule occurs in 10th Century.

Da is pronounced in western Armenian as [tʰɑ] / [tʰ] and in classical / eastern Armenian as Latin D – [da] / [d].
The numerical value of Da is 4.
The biblical name of Da is Դատավոր/Judge.

 tat  tat