What was the name of Lot's wife?
A summary of why she got the name from the Yalkut Reuvani with the Pirush of Rabenu Ephraim. The Poor would ask for Lechem (bread), and she would give them Melach (salt). So the Poor people davened that she that should become a pillar of salt. Hashem listened to their prayers. She answered "Amen" too, she lacked Chemlah (compassion), which means Rachmanus, so she was turned into Melach.
Summary: The poor asked for לחם, she had no חמל, so she became a Pillar of מלח.