וַתֵּ֣לֶד בֵּ֔ן וַיִּקְרָ֥א אֶת־שְׁמ֖וֹ גֵּרְשֹׁ֑ם כִּ֣י אָמַ֔ר גֵּ֣ר הָיִ֔יתִי בְּאֶ֖רֶץ נָכְרִיָּֽה׃ (פ)
And she bore a son, and he called his name Gershom; for he said: ‘I have been a stranger in a strange land.’
Read kabbalistic (mystical) interpretation of Exodus 2:22: and classical mystical sources.