I.e., Parnal (Gardner) Coffin, aged 59.B. 24 June 1756. M. 1773 to Reuben Coffin (b. 1754, appears to have d. by 1815) son of Tristram and Elizabeth (Starbuck) Coffin. Parnal and Reuben Coffin and children came to Dartmouth with the Nantucket Whalers. She is the mother of Louisa's mother, Phebe (Coffin) Collins. (D. 3 July 1820.)
For reasons why "Grandmama" could not be the mother of Louisa's father, see S10n8 .