God of the Hebrews is the name that Moses used when he was speaking to Pharaoh. Pharaoh would never have understood or taken seriously the personal name of God, Yahweh (Jehovah), so God told Moses to use the simple generic name. God was certainly the God of His people, the Hebrews, but they knew Him by more intimate names than that.
God of the Hebrews in Hebrew:
’Elohei ha‘Ivrim (or ‘Ivriyyim)
Strong’s Concordance numbers: 430, 5680
Bible references: Ex. 3:18; 5:3; 7:16; 9:1, 13; 10:3
God spoke to Moses and said:
The elders of Israel will listen to you. Then you and the elders are to go to the king of Egypt and say to him, “The Lord, the God of the Hebrews, has met with us. Let us take a three-day journey into the wilderness to offer sacrifices to the Lord our God.” (Exodus 3:18 NIV)