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Female Tryphena Rockwell Click to view Tryphena Rockwell in the family tree

Tryphena was born after 1754.1   Tryphena's father was Samuel Rockwell and her mother was Mabel Mehitable Loomis.  Her paternal grandparents were Thomas Grant and Elizabeth Rockwell; her maternal grandparents were Moses Loomis and Elizabeth Bidwell. She had three brothers and a sister, and also a sibling of unknown gender, named Gustavus, Thomas, Sylvester, Elizabeth and Wereham.  She was the third youngest of the six children.1 

1 phelps.FTW @ Tree #0105
Further sources/citations:
World Family Tree Vol. 3, Ed. 1 @ Tree #3669, 3669.ftw