Hu or Huwa is a name for God

God

God is the English name given to a singular being in theistic and deistic religions who is either the sole deity in monotheism, or a single deity in polytheism....

 in Sufism

Sufism

Sufism or ' is defined by its adherents as the inner, mystical dimension of Islam. A practitioner of this tradition is generally known as a '...

. Literally: He. God. http://www.avatarmeherbaba.org/erics/glossh-j.html

In Sufism Hu or Huwa is the pronoun used with Allah

Allah

Allah is a word for God used in the context of Islam. In Arabic, the word means simply "God". It is used primarily by Muslims and Bahá'ís, and often, albeit not exclusively, used by Arabic-speaking Eastern Catholic Christians, Maltese Roman Catholics, Eastern Orthodox Christians, Mizrahi Jews and...

 or God, and is used as a name of God. Allah Hu means "God, Just He!" In Arabic Allah means God and with Hu, as an intensive

Intensive

In grammar, an intensive word form is one which denotes stronger or more forceful action relative to the root on which the intensive is built. Intensives are usually lexical formations, but there may be a regular process for forming intensives from a root...

 added to Allah, means "God himself." Hu is also found in the Islamic credo La Ilaha Ila Allah Hu: "There is no God but Allah," or in Sufi interpretation "There is no reality, except God", or in La Ilaha Ila Huwa meaning "There is no god but He" http://www.tobyjohnson.com/sufidancing.html

Summary

The term Hu in reference to a creator or god is linked to many cultures and religions. The ancient Egyptians http://www.touregypt.net/featurestories/hu.htm and the Druid are just a few.http://www.sourcetext.com/hupage/[Proper citation required on druid statement, the link does not mention druid.]

Non-Muslims may speculate that the pronoun when used by the Sufi (and Muslim

Muslim

A Muslim, also spelled Moslem, is an adherent of Islam, a monotheistic, Abrahamic religion based on the Quran, which Muslims consider the verbatim word of God as revealed to prophet Muhammad. "Muslim" is the Arabic term for "submitter" .Muslims believe that God is one and incomparable...

) is simply a shorter form of the Hebrew Tetragrammaton

Tetragrammaton

The term Tetragrammaton refers to the name of the God of Israel YHWH used in the Hebrew Bible.-Hebrew Bible:...

 due to the similarities between Sura

Sura

A sura is a division of the Qur'an, often referred to as a chapter. The term chapter is sometimes avoided, as the suras are of unequal length; the shortest sura has only three ayat while the longest contains 286 ayat...

 Al-Ikhlas 112:1 in the Quran http://www.usc.edu/schools/college/crcc/engagement/resources/texts/muslim/quran/112.qmt.html and Deuteronomy

Deuteronomy

The Book of Deuteronomy is the fifth book of the Hebrew Bible, and of the Jewish Torah/Pentateuch...

 6:4 in the Hebrew Bible

Bible

The Bible refers to any one of the collections of the primary religious texts of Judaism and Christianity. There is no common version of the Bible, as the individual books , their contents and their order vary among denominations...

.
http://www.mechon-mamre.org/p/pt/pt0506.htm

• Sura Al-Ikhlas (112:1) - Say: He, Allah, is One.
  • Transliteration
    Transliteration
    Transliteration is a subset of the science of hermeneutics. It is a form of translation, and is the practice of converting a text from one script into another...
    
    : qul huwa Allah hu ahad

• Deuteronomy 6:4 - Hear, O Israel: the LORD our God, the LORD is one.
  • Transliteration : shema ysrael yahowah elohynu yahowah achad