I don't wish to add to the confusion and I KNOW how muddling it can be because of repetitve names but here goes:
I have a William Grove/Groves(b ca 1817) as my g-g-g-grandfather. His ddaughter, Sara Elizabeth Grove/Groves (b 1839) married(1857) Hugh Davis (b-1832) and gave birth to their last child my g- grandmother Annie Davis (b1869) who married John Robey leading to my Grandmother Addie Mary Robey.
William was a seafaring man as was Hugh Davis early on. (Hugh and Sara later ran a pub near the harbor n Baltimore) Both Hugh and William are listed in the US Census as Mariners in the earliest records.They lived in Maryland. A William Grove/Groves is listed again and again in Baltimore, however All those listings haven't been verified yet.
I would call it a coincidence except our family lore tells us that Annie Davis was orphaned and sent to live with an aunt, Eliza (married surname unknown) in Washington D.C. . Eliza was best friends with Matilda Robey and the two encouraged the joining of the son andneice, John Robey and Annie Davis.
I haven't traced William's background yet so can't offer more at this moment. . Do you think one of the siblings or offspring of your Eliza Grove may have settled in Maryland instead of the Mid weatern US? Hugh Davis is listed oon the various Census reports as born in Ireland. I acknowledge that his name is VERY Welsh and the family lore said we had Welsh roots on that side. Perhaps his family came by way of Ireland first. TheI Irish-mariner connection makes a link with William Grove very possible.