Albert Barnes Commentary 1 Chronicles 4:17

"And the sons of Ezrah: Jether, and Mered, and Epher, and Jalon; and she bare Miriam, and Shammai, and Ishbah the father of Eshtemoa." — 1 Chronicles 4:17 (ASV)

She bore Miriam - Rather, “she conceived.” The mother is not mentioned, and it seems impossible to restore the original text with any certainty.