Parashas Shemos · Passuk 1:15
וַיֹּ֙אמֶר֙ מֶ֣לֶךְ מִצְרַ֔יִם לַֽמְיַלְּדֹ֖ת הָֽעִבְרִיֹּ֑ת אֲשֶׁ֨ר שֵׁ֤ם הָֽאַחַת֙ שִׁפְרָ֔ה וְשֵׁ֥ם הַשֵּׁנִ֖ית פּוּעָֽה׃
The king of Egypt spoke to the Hebrew midwives, one of whom was named Shiphrah and the other Puah,
Torah Temimah points to baraisa — Sotah 11b (verified).
תניא, שפרה זו יוכבד, ולמה נקרא שמה שפרה – שמשפרת את הולד. פועה זו מרים, ולמה נקרא שמה פועה – שהיתה פועה לולד.
English: It was taught: Shifra is Yocheved — why was she called Shifra? Because she beautified (meshaperes) the newborn. Puah is Miriam — why was she called Puah? Because she cooed (po’ah) to the newborn.
Custom — name etymologies from the midwives’ deeds.
Chazal teach that the very names of the midwives already describe the life-giving care they gave the infants they refused to kill.