Ann Pamela CunninghamNo, Louise du Pont Crowninshield and Mary Bowditch Crowninshield were not directly related by blood. Their connection was through the Crowninshield family, into which Louise married. Louise du Pont married Francis Boardman Crowninshield in 1900, becoming part of the Crowninshield lineage that Mary Bowditch Crowninshield also belonged to, albeit from an earlier generation.

The Crowninshield Family Connection:

Mary Bowditch Crowninshield (1812–1892) was a member of an earlier branch of the Crowninshield family, descendants of the wealthy and influential maritime and political dynasty in New England.

Louise du Pont Crowninshield (1877–1958) joined the family through her marriage to Francis, a scion of this illustrious family. Her husband was distantly related to Mary through the larger Crowninshield family tree.

Relationship:

Distantly Related by Marriage:

Mary and Louise’s husband likely shared a common Crowninshield ancestor from the early New England settlers. However, the exact genealogical link between Mary and Louise’s husband would require a detailed family tree review to determine how closely they were related.

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Louise du Pont Crowninshield and Mary Bowditch Crowninshield were not blood relatives, but both were connected to the prominent Crowninshield family, which had roots in Massachusetts' mercantile and political circles.

Louise du Pont Crowninshield (1877–1958) was a preservationist and a member of the du Pont family through her father. She married Francis Boardman Crowninshield, linking her to the Crowninshield family by marriage​

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Mary Bowditch Crowninshield (1778–1853), part of an earlier generation, was also a member of this family, contributing to its legacy in cultural and historical preservation through her efforts with maritime and family-related history​

Although their shared family name suggests a connection, Louise's ties to the Crowninshields were through marriage rather than direct lineage. Both, however, were dedicated to preserving American heritage and family traditions, albeit in different eras and ways.