There are multiple origins and meanings for the name Marianne:
1. Feminine form of the given name Marian - "marine"
2. Combination of the proper nouns Mary - "Theotokos; our lady (Mother of God)" + Anna/Ann/Hannah - "pleasure, enjoyment, relish, entertainment, boon"
Marianne - is a national symbol and nickname of France since 1792 (the French Revolution) and a portrayal of the Goddess of Liberty.