"They made war with Bera king of Sodom" (Genesis 14:2). Rabbi Meir used to expound names. Bera, a son of evil. Birsha, a son of a wicked man. Shinav, because he would draw in money. And Shemever, because he would soar up and bring in money. "And the king of Bela," this is Zoar, because its inhabitants were swallowed up.
Rabbi Meir Expounds the Wicked Names of the Kings of Sodom
Yalkut Shimoni on Torah 72:4
(בראשית יד ב) עָשׂוּ מִלְחָמָה אֶת בֶּרַע מֶלֶךְ סְדוֹם. רַבִּי מֵאִיר הָיָה דּוֹרֵשׁ שֵׁמוֹת, בֶּרַע בֶּן רָע, בִּרְשַׁע בֶּן רָשָׁע. שִׁנְאָב, שֶׁהָיָה שׁוֹאֵב מָמוֹן, וְשֵׁמְאֵבֶר שֶׁהָיָה פּוֹרֵחַ וּמֵבִיא מָמוֹן. וּמֶלֶךְ בֶּלַע הִיא צֹעַר שֶׁנִּתְבַּלְּעוּ דִּיוּרֵיהּ.