It is quite possible that Lucinda is related to Poebe Jane Kash.Poebe (sometimes spelled Pheba) had an aunt named Lucinda Kash, b. 1802 and her grandmother was Poebe Lacy, b. 1774.It looks as though Lucinda Lacy and Lucinda Kash could have been cousins.I am emailing an old genealogy for the Kashes (originally spelled Cash) that I received after posting the message that you responded to (I couldn't figure out how to copy it to this message).I hope that this might help you in your search.
If I run across anything else that I think might help, I'll email it to you.
If anyone else needs this information, please email me and I'll send it to you.