I hate it, too, and there are still some peculiarities.
"Page" is a Burleigh Plantation slave surname. According to Susan Dabney Smedes, one of Thomas Dabney's daughters, slaves there had surnames. George Page is the best documented, being the personal body servant of Thomas Dabney.
No surnames for Augustine Dabney's slaves are mentioned in any of the three memoirs left by his children, Mary Dabney Ware, Thomas Gregory Dabney, and Letitia Dabney Miller. Augustine's slave boy Henry, however, spent considerable time in the company of Thomas' 150-odd slaves. It may be that he admired George Page and later took his surname. However, it may also be that the Henry Page whose young (19) wife cooked for Augustine Dabney in 1870 was *not* the Henry of Letitia Dabney's memoir but instead one of Thomas' ex-slaves.
However, the ages of Letitia's Henry and of Henry Page match well, and Letitia describes Henry as still working for the family in 1866.