Hebrew Words for Lord my God:
Strong’s Concordance numbers: 136, 430
Bible references: Ps. 38:15 and about forty times elsewhere in the Old Testament.
For I hope in You, O Lord;
You will answer, O Lord my God. (Psalm 38:15)
Two similar names for God occur. One (with the Hebrew words reversed) is found in Psalm 35:23: my God and my Lord (’Elohai wa’Adonai). LORD my God (Yahweh ’elohai) is a name in Psalm 13:3.
Names of God that include both the English words “Lord” and “God” can be confusing. The best way to distinguish them is by looking at the different Hebrew words that underlie the names. Both ’Adonai and Yahweh are translated “Lord” in English but when Yahweh underlies the word it is written in capitals “LORD.”
In the New Testament, when Thomas met the risen Jesus (Yeshua‘), he exclaimed “My Lord and my God!” (John 20:28)