The name of God in the Hebrew Bible is YHWH, pronounced Yahweh or Jehovah.
There are many words used in the Hebrew Bible for the word 'God' (not the name of God), such us El (god), Elohim (god, plural form), El Shaddai (god almighty), Adonai (master), Elyon (highest) and Avinu (our father) are regarded by many religious Jews not as names, but as epithets highlighting different aspects of YHWH and the various 'roles' of God (source).
From Wikipedia article on Allah,
The term Allāh is derived from a contraction of the Arabic definite
article al- "the" and ilāh "deity, god" to al-lāh meaning "the [sole]
deity, God" (ὁ θεὸς μόνος, ho theos monos). Cognates of the name
"Allāh" exist in other Semitic languages, including Hebrew and
Aramaic. Biblical Hebrew mostly uses the plural form (but
functional singular) Elohim. The corresponding Aramaic form is ʼĔlāhā
ܐܠܗܐ in Biblical Aramaic and ʼAlâhâ ܐܲܠܵܗܵܐ in Syriac as used by the
Assyrian Church, both meaning simply 'God'.
Elohim is not the name of God, it is simply 'God' in Hebrew. Many languages have some similarities because many of them share the same origin. 'God' in English, 'Elohim' in Hebrew, 'Elaha' in Aramaic, 'Alaha' in Syriac etc. but the name of God in the Bible is YHWH, not Allah as some Muslim scholars may try to relate them. Hence, the God in the Bible is YHWH and the god in the Qu'ran is Allah.
The most specific Hebrew name for God is YHWH, also mistakenly referred to as Yehovah, meaning self-existent and eternal. YHWH is rooted from ‘Hayah’, the to be verb, which is from ‘Hava’, to breathe, or to be, which connects to ‘Ayil’. Finally ‘Ayil’ leads us back to ‘El’, which is the root of all the Semitic names for God. YHWH is spoken aloud on rare Jewish celebrations as just “Ya.” Jews often replaced the actual name of God for Adonay (Lord) orally and in their written scripts.
For instance, see this typical translation of Exodus 20:7
Thou shalt not take the name of YHWH thy Elohim in vain; for YHWH will
not hold him guiltless that taketh his name in vain.
Jesus spoke Aramaic many times during His ministry, hence, he must have used the word 'Eli' or 'Elaha' (ʼĔlāhā) many times to say 'God'. For instance, while Jesus was on the cross, He cried out in Aramaic.
About three in the afternoon Jesus cried out in a loud voice, “Eli,
Eli[a], lema sabachthani?” (which means “My God, my God, why have you
forsaken me?”) [Matthew 27:46, NIV]
[a] Some manuscripts Eloi, Eloi