וַיִּזְעֲק֤וּ בְנֵֽי־יִשְׂרָאֵל֙ אֶל־יְהוָ֔ה וַיָּ֨קֶם יְהוָ֥ה מוֹשִׁ֛יעַ לִבְנֵ֥י יִשְׂרָאֵ֖ל וַיּֽוֹשִׁיעֵ֑ם אֵ֚ת עָתְנִיאֵ֣ל בֶּן־קְנַ֔ז אֲחִ֥י כָלֵ֖ב הַקָּטֹ֥ן מִמֶּֽנּוּ׃
And when the children of Israel cried unto the LORD, the LORD raised up a saviour to the children of Israel, who saved them, even Othniel the son of Kenaz, Caleb’s younger brother.
Metzudat David on Judges
OTNIEL: It focuses on "savior" to teach that Otniel was established to save.