U+0744 SYRIAC TWO VERTICAL DOTS BELOW

U+0744 was added to Unicode in version 3.0 (1999). It belongs to the block Syriac in the Basic Multilingual Plane.

This character is a Nonspacing Mark and is mainly used in the Syriac script.

The glyph is not a composition. It has a Neutral East Asian Width. In bidirectional context it acts as Nonspacing Mark and is not mirrored. In text U+0744 behaves as Combining Mark regarding line breaks. It has type Extend for sentence and Extend for word breaks. The Grapheme Cluster Break is Extend.

The Wikipedia has the following information about this codepoint:

The Syriac alphabet is a writing system primarily used to write the Syriac language from the 1st century AD. It is one of the Semitic abjads directly descending from the Aramaic alphabet and shares similarities with the Phoenician, Hebrew, Arabic, and the traditional Mongolian alphabets.

Syriac is written from right to left. It is a cursive script where some, but not all, letters connect within a word. The alphabet consists of 22 letters, all of which are consonants. The vowel sounds are supplied by the reader's memory or by pointing (a system of diacritical marks to indicate the correct reading).

In addition to the sounds of the language, the letters of the Syriac alphabet can be used to represent numbers in a system similar to Hebrew and Greek numerals.

When Arabic began to be the dominant spoken language in the Fertile Crescent, texts were often written in Arabic with the Syriac script. Malayalam was also written with Syriac script and was called Suriyani Malayalam. These writings are usually called Karshuni or Garshuni (ܓܪܫܘܢܝ). Garshuni is often used today by Neo-Aramaic speakers in written communication such as letters and fliers.