The One God has been addressed by different names in Bible:
“ELAH” is the name for God, used about 70 times in the Old Testament. It is very similar to Arabic “Allah” or ‘Eelah’. إِلٰهَ Elahh [hla]‘ (Aramaic; el-aw’): corresponding to God. [Arabic Bible uses ‘Allah’ for God] In Hebrew [hwla] ‘elowahh el-o’-ah; probably prolonged (emphat.) from [la]‘el ale; a deity or the Deity:–God, god. Again, when combined with other words, we see different attributes of God. Some examples: Elah Yerush’lem – God of Jerusalem: (Ezra;7:19), Elah Yisrael – God of Israel: (Ezra;5:1), Elah Sh’maya – God of Heaven:(Ezra 7:23). Elah Sh’maya V’Arah – God of Heaven and Earth: (Ezra;5:11).
NT quotes Jesus Christ using Aramaic ELI (God):-
46ܘܠܐܦܝ ܬܫܥ ܫܥܝܢ ܩܥܐ ܝܫܘܥ ܒܩܠܐ ܪܡܐ ܘܐܡܪ ܐܝܠ ܐܝܠ ܠܡܢܐ ܫܒܩܬܢܝ ܀
“About the ninth hour Jesus cried out with a loud voice, saying, “ELI, ELI, LAMA SABACHTHANI?” that is, “MY GOD, MY GOD, WHY HAVE YOU FORSAKEN ME?”[Matthew 27:46, Mark 15:34, Psalm 22:1]
περὶ δὲ τὴν ἐνάτην ὥραν ἀνεβόησεν ὁ Ἰησοῦς φωνῇ μεγάλῃ λέγων· Ἠλὶ ἠλὶ λεμὰ σαβαχθάνι; τοῦτ’ ἔστιν· Θεέ μου θεέ μου, ἱνατί με ἐγκατέλιπες;
ونحو الساعة التاسعة صرخ يسوع بصوت عظيم قائلا ايلي ايلي لما شبقتني اي الهي الهي لماذا تركتني.
Hebrew Text Psalm 22:1
לַ֭מְנַצֵּחַ עַל־אַיֶּ֥לֶת הַשַּׁ֗חַר מִזְמֹ֥ור לְדָוִֽד׃ אֵלִ֣י אֵ֭לִי לָמָ֣ה עֲזַבְתָּ֑נִי רָחֹ֥וק מִֽ֝ישׁוּעָתִ֗י דִּבְרֵ֥י שַׁאֲגָתִֽי׃
’ê-lî אֵלִ֣י My God [http://biblehub.com/text/psalms/22-1.htm ]
The Islamic way to profess faith is to recite, declare; Kalimah Tayyibah kalimat aṭ-ṭaiyibah (Word of Purity), shahada.
لَا إِلٰهَ إِلَّا الله مُحَمَّدٌ رَسُولُ الله
‘lā ilāha illā -llāh, muḥammadur rasūlu -llāh
There is no god (ilaha) but Allah, [and] Muhammad is the messenger of Allah.
The Arab Christians also use ‘Allah’ as name of God in the Arabic Bible.
The other names of God mentioned in Bible are:
“EL” is another name used for God in the Bible, showing up about 200 times in the Old Testament. El is the simple form arising from Elohim, and is often combined with other words for descriptive emphasis. Some examples: El HaNe’eman – The Faithful God: (Deuteronomy 7:9). El HaGadol – The Great God: (Deuteronomy 10:17). El HaKadosh – The Holy God: (Isaiah 5:16). El Yisrael – The God Of Israel: (Psalm 68:35). El HaShamayim – The God Of The Heavens: (Psalm 136:26). El De’ot – The God Of Knowledge: (1 Samuel 2:3). El Emet – The God Of Truth: (Psalm 31:6). El Yeshuati – The God Of My Salvation: (Isaiah 12:2). El Elyon – The Most High God: (Genesis 14:18). Immanu El – God Is With Us: (Isaiah 7:14). El Olam – The God Of Eternity (Genesis 21:33). El Echad – The One God: (Malachi 2:10). “Have we not all one father? Has not one God created us?” [Malachi;2:10]
“ELOHIM” (or Elohay) is the first name for God found in the Bible, and it’s used throughout the Old Testament over 2,300 times. Elohim comes from the Hebrew root meaning “strength” or “power”, and has the unusual characteristic of being plural in form. In Genesis 1:1, we read, “In the beginning Elohim created the heaven and the earth.” Right from the start, this plural form for the name of God is used to describe the One God, a mystery that is uncovered throughout the rest of the Bible. Throughout scripture, Elohim is combined with other words to describe certain characteristics of God. Some examples: Elohay Kedem – God of the Beginning: (Deuteronomy 33:27). Elohay Mishpat – God of Justice: (Isaiah 30:18). Elohay Selichot – God of Forgiveness: (Nehemiah 9:17). Elohay Marom – God of Heights: (Micah 6:6). Elohay Mikarov – God Who Is Near: (Jeremiah 23:23). Elohay Mauzi – God of My Strength: (Psalm 43:2).Elohay Tehilati – God of My Praise: (Psalm 109:1). Elohay Yishi – God Of My Salvation: (Psalm 18:47, 25:5). Elohim Kedoshim – Holy God: (Leviticus 19:2, Joshua 24:19). Elohim Chaiyim – Living God: (Jeremiah 10:10). Elohay Elohim – God of Gods: (Deuteronomy;10:17).
“YHVH” is the Hebrew word that translates as “LORD”. Found more often in the Old Testament than any other name for God (approximately 7,000 times), the title is also referred to as the “Tetragrammaton” meaning the “The Four Letters”. YHVH comes from the Hebrew verb “to be” and is the special name that God revealed to Moses at the burning bush. “And God said to Moses, ‘I AM WHO I AM; and He said, thus you shall say to the sons of Israel, I AM has sent me to you… this is My eternal name, and this is how I am to be recalled for all generations’” (Exodus;3:14-15). Therefore, YHVH declares God’s absolute being – the source of everything, without beginning and without end. Although some pronounce YHVH as “Jehovah” or “Yaweh,” scholars really don’t know the proper pronunciation. The Jews stopped pronouncing this name by about 200 A.D., out of fear of breaking the commandment “You shall not take the name of YHVH your God in vain” (Exodus;20:7). (Today’s rabbis typically use “Adonai” in place of YHVH.) Here are some examples of YHVH used in scripture: YHVH Elohim – LORD God: (Genesis;2:4). YHVH M’kadesh – The LORD Who Makes Holy: (Ezekiel;37:28). YHVH Yireh – The LORD Who Sees/provides: (Genesis;22:14). YHVH Nissi – The LORD My Banner: (Exodus;17:15). YHVH Shalom – The LORD of Peace: (Judges;6:24). YHVH Tzidkaynu – The LORD Our Righteousness: (Jeremiah;33:16). YHVH O’saynu – The LORD our Maker:(Psalm;95:6).
Since the Christians initially had the Old Testament scriptures as their ‘Bible’ and frequently quoted from it in the New Testament, some of the names for God carry over into the New. Most frequently simply the term God is used. Jesus Christ in referring to God calls Him Father [metaphorically, being the Creator and Sustainer, not biologically]. The New Testament in completion of the Old adds the revelation of Jesus Christ as being a name for God, as one of the divine persons in the trinity. The Holy Spirit or Holy Ghost is considered to be fully equal as such being part of the three persons.