I am pretty sure there is a connection, but I'm not sophisticated enough in my research to know how. The Sara JACOB MCDERMOTT I've been looking for is actually Bridget and Kate JACOB GLACCUM is Catherine, who is Bridget's twin.
There's a previous post from a Jeanne in 2002, who located the above information, but I only received confirmation from a Kildare McDermott relative t that these are my relatives. (The John McDermott marriage to Mary Ennis being the clincher).
Several years ago, a woman from Bartlesville, OK contacted me inquiring about the GLACCUM in my posting, but at the time I hadn't know he was married to my gr-grandmother's twin sister.
I attempted to contact her but no reply.