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- The Mayflower Society
- Menorcan Cultural Society
- Military Order of Foreign Wars of the United States
- Military Order of the Carabao
- Military Order of the Crusades
- Military Order of the Loyal Legion of the United States
- Military Order of the Stars and Bars
- Military Society of the War of 1812
- Minnesota Territorial Pioneers
- Monticello Association
- Morgan's Men Association
Read more about this topic: List Of Hereditary And Lineage Organizations