עֵיפָהʻÊyphâh

Ephah, the name of a son of Midian, and of the region settled by him; also of an Israelite and of an Israelitess

Pronunciation: ay-faw' · Hebrew/Aramaic (Old Testament) · H5891

Meanings

1. 'son' of Midian (Genesis 25:4; 1 Chronicles 1:33; Isaiah 60:6)

2. name in Judah (1 Chronicles 2:47)

3. concubine of Caleb (1 Chronicles 2:46)

Same root

עֵיפָהʻêyphâh · H5890obscurity (as if from covering)

Where it appears

Appears 5 times in the Bible.

Genesis 25:4 Midian’s sons were Ephah, Epher, Hanoch, Abida, and Eldaah. These were all descendants of Abraham through Keturah.
1 Chronicles 1:33 The sons of Midian were Ephah, Epher, Hanoch, Abida, and Eldaah. All these were descendants of Abraham through his concubine Keturah.
1 Chronicles 2:46 Caleb’s concubine Ephah gave birth to Haran, Moza, and Gazez. Haran was the father of Gazez.
1 Chronicles 2:47 The sons of Jahdai were Regem, Jotham, Geshan, Pelet, Ephah, and Shaaph.
Isaiah 60:6 Vast caravans of camels will converge on you, the camels of Midian and Ephah. The people of Sheba will bring gold and frankincense and will come worshiping the Lord.

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).